diff --git a/lib/cloud_controller/backends/runners.rb b/lib/cloud_controller/backends/runners.rb
index ad037b79e26..9d42da62551 100644
--- a/lib/cloud_controller/backends/runners.rb
+++ b/lib/cloud_controller/backends/runners.rb
@@ -1,10 +1,4 @@
-require 'cloud_controller/diego'
 require 'cloud_controller/diego/runner'
-require 'cloud_controller/diego/process_guid'
-require 'cloud_controller/diego/buildpack/lifecycle_protocol'
-require 'cloud_controller/diego/docker/lifecycle_protocol'
-require 'cloud_controller/diego/cnb/lifecycle_protocol'
-require 'cloud_controller/diego/egress_rules'
 
 module VCAP::CloudController
   class Runners
@@ -13,69 +7,7 @@ def initialize(config)
     end
 
     def runner_for_process(process)
-      diego_runner(process)
-    end
-
-    def diego_processes(batch_size, last_id)
-      ProcessModel.select_all(ProcessModel.table_name).
-        diego.
-        runnable.
-        where(Sequel.lit("#{ProcessModel.table_name}.id > ?", last_id)).
-        order(:"#{ProcessModel.table_name}__id").
-        limit(batch_size).
-        eager(:desired_droplet, :space, :service_bindings, { routes: :domain }, { app: :buildpack_lifecycle_data }).
-        all
-    end
-
-    def processes_from_diego_process_guids(diego_process_guids)
-      diego_process_guids = Array(diego_process_guids).to_set
-      ProcessModel.select_all(ProcessModel.table_name).
-        diego.
-        runnable.
-        where("#{ProcessModel.table_name}__guid": diego_process_guids.map { |pg| Diego::ProcessGuid.cc_process_guid(pg) }).
-        order(:"#{ProcessModel.table_name}__id").
-        eager(:desired_droplet, :space, :service_bindings, { routes: :domain }, { app: :buildpack_lifecycle_data }).
-        all.
-        select { |process| diego_process_guids.include?(Diego::ProcessGuid.from_process(process)) }
-    end
-
-    def diego_apps_cache_data(batch_size, last_id)
-      diego_apps = ProcessModel.
-                   diego.
-                   runnable.
-                   where(Sequel.lit("#{ProcessModel.table_name}.id > ?", last_id)).
-                   order(:"#{ProcessModel.table_name}__id").
-                   limit(batch_size)
-
-      diego_apps = diego_apps.buildpack_type unless FeatureFlag.enabled?(:diego_docker)
-
-      diego_apps.select_map([
-        :"#{ProcessModel.table_name}__id",
-        :"#{ProcessModel.table_name}__guid",
-        :"#{ProcessModel.table_name}__version",
-        :"#{ProcessModel.table_name}__updated_at"
-      ])
-    end
-
-    def latest(items)
-      current = {}
-
-      items.each do |item|
-        c = current[item[:app_guid]]
-        current[item[:app_guid]] = item if c.nil? || (item[:created_at] == c[:created_at] && item[:id] > c[:id])
-      end
-
-      current
-    end
-
-    private
-
-    def diego_runner(process)
       Diego::Runner.new(process, @config)
     end
-
-    def dependency_locator
-      CloudController::DependencyLocator.instance
-    end
   end
 end
diff --git a/spec/unit/lib/cloud_controller/backends/runners_spec.rb b/spec/unit/lib/cloud_controller/backends/runners_spec.rb
index 4a01943a5f8..66f113105b9 100644
--- a/spec/unit/lib/cloud_controller/backends/runners_spec.rb
+++ b/spec/unit/lib/cloud_controller/backends/runners_spec.rb
@@ -1,5 +1,4 @@
 require 'spec_helper'
-require 'cloud_controller/diego/process_guid'
 
 module VCAP::CloudController
   RSpec.describe Runners do
@@ -12,20 +11,14 @@ module VCAP::CloudController
                    }
                  })
     end
-    let(:package_hash) { 'fake-package-hash' }
-    let(:buildpack) { instance_double(AutoDetectionBuildpack, custom?: false) }
-    let(:docker_image) { nil }
 
-    describe '#runner_for_app' do
-      subject(:runner) do
-        runners.runner_for_process(process)
-      end
+    describe '#runner_for_process' do
+      subject(:runner) { runners.runner_for_process(process) }
 
       context 'when the app is configured to run on Diego' do
         let(:process) { ProcessModelFactory.make(diego: true) }
 
-        it 'finds a diego backend' do
-          expect(runners).to receive(:diego_runner).with(process).and_call_original
+        it 'returns a Diego runner' do
           expect(runner).to be_a(Diego::Runner)
         end
 
@@ -33,272 +26,10 @@ module VCAP::CloudController
           let(:process) { ProcessModelFactory.make(:docker, docker_image: 'foobar') }
 
           it 'finds a diego backend' do
-            expect(runners).to receive(:diego_runner).with(process).and_call_original
             expect(runner).to be_a(Diego::Runner)
           end
         end
       end
     end
-
-    describe '#diego_apps' do
-      let!(:diego_process1) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process2) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process3) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process4) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process5) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-
-      it 'returns apps that have the desired data' do
-        last_process = ProcessModelFactory.make(diego: true, state: 'STARTED', version: 'app-version-6')
-
-        apps = runners.diego_processes(100, 0)
-
-        expect(apps.count).to eq(6)
-
-        expect(apps.last.to_json).to match_object(last_process.to_json)
-      end
-
-      it 'respects the batch_size' do
-        app_counts = [3, 5].map do |batch_size|
-          runners.diego_processes(batch_size, 0).count
-        end
-
-        expect(app_counts).to eq([3, 5])
-      end
-
-      it 'returns non-intersecting apps across subsequent batches' do
-        first_batch = runners.diego_processes(3, 0)
-        expect(first_batch.count).to eq(3)
-
-        second_batch = runners.diego_processes(3, first_batch.last.id)
-        expect(second_batch.count).to eq(2)
-
-        expect(second_batch & first_batch).to eq([])
-      end
-
-      it 'does not return unstaged apps' do
-        unstaged_process = ProcessModelFactory.make(diego: true, state: 'STARTED')
-        unstaged_process.desired_droplet.app.update(droplet_guid: nil)
-        unstaged_process.desired_droplet.destroy
-
-        batch = runners.diego_processes(100, 0)
-
-        expect(batch).not_to include(unstaged_process)
-      end
-
-      it "does not return apps which aren't expected to be started" do
-        stopped_process = ProcessModelFactory.make(diego: true, state: 'STOPPED')
-
-        batch = runners.diego_processes(100, 0)
-
-        expect(batch).not_to include(stopped_process)
-      end
-    end
-
-    describe '#diego_apps_from_process_guids' do
-      let!(:diego_process1) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process2) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process3) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process4) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process5) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-
-      it 'does not return unstaged apps' do
-        unstaged_process = ProcessModelFactory.make(diego: true, state: 'STARTED')
-        unstaged_process.desired_droplet.app.update(droplet_guid: nil)
-        unstaged_process.desired_droplet.destroy
-
-        batch = runners.processes_from_diego_process_guids(Diego::ProcessGuid.from_process(unstaged_process))
-
-        expect(batch).not_to include(unstaged_process)
-      end
-
-      it 'does not return apps that are stopped' do
-        stopped_process = ProcessModelFactory.make(diego: true, state: 'STOPPED')
-
-        batch = runners.processes_from_diego_process_guids(Diego::ProcessGuid.from_process(stopped_process))
-
-        expect(batch).not_to include(stopped_process)
-      end
-
-      it 'accepts a process guid or an array of process guids' do
-        process = ProcessModel.where(diego: true).order(:id).first
-        process_guid = Diego::ProcessGuid.from_process(process)
-
-        expect(runners.processes_from_diego_process_guids(process_guid)).to eq([process])
-        expect(runners.processes_from_diego_process_guids([process_guid])).to eq([process])
-      end
-
-      it 'returns diego apps for each requested process guid' do
-        diego_apps  = ProcessModel.where(diego: true).all
-        diego_guids = diego_apps.map { |process| Diego::ProcessGuid.from_process(process) }
-
-        expect(runners.processes_from_diego_process_guids(diego_guids)).to match_array(diego_apps)
-      end
-
-      context 'when the process guid is not found' do
-        it 'does not return an app' do
-          process = ProcessModel.where(diego: true).order(:id).first
-          process_guid = Diego::ProcessGuid.from_process(process)
-
-          expect do
-            process.set_new_version
-            process.save
-          end.to change {
-            runners.processes_from_diego_process_guids(process_guid)
-          }.from([process]).to([])
-        end
-      end
-    end
-
-    describe '#diego_apps_cache_data' do
-      let!(:diego_process1) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process2) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process3) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process4) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-      let!(:diego_process5) { ProcessModelFactory.make(diego: true, state: 'STARTED') }
-
-      it 'respects the batch_size' do
-        data_count = [3, 5].map do |batch_size|
-          runners.diego_apps_cache_data(batch_size, 0).count
-        end
-
-        expect(data_count).to eq([3, 5])
-      end
-
-      it 'returns data for non-intersecting apps across subsequent batches' do
-        first_batch = runners.diego_apps_cache_data(3, 0)
-        expect(first_batch.count).to eq(3)
-
-        last_id      = first_batch.last[0]
-        second_batch = runners.diego_apps_cache_data(3, last_id)
-        expect(second_batch.count).to eq(2)
-      end
-
-      it 'does not return unstaged apps' do
-        unstaged_process = ProcessModelFactory.make(diego: true, state: 'STARTED')
-        unstaged_process.desired_droplet.app.update(droplet_guid: nil)
-        unstaged_process.desired_droplet.destroy
-
-        batch   = runners.diego_apps_cache_data(100, 0)
-        app_ids = batch.pluck(0)
-
-        expect(app_ids).not_to include(unstaged_process.id)
-      end
-
-      it 'does not return apps that are stopped' do
-        stopped_process = ProcessModelFactory.make(diego: true, state: 'STOPPED')
-
-        batch   = runners.diego_apps_cache_data(100, 0)
-        app_ids = batch.pluck(0)
-
-        expect(app_ids).not_to include(stopped_process.id)
-      end
-
-      it 'acquires the data in one select' do
-        expect do
-          runners.diego_apps_cache_data(100, 0)
-        end.to have_queried_db_times(/SELECT.*FROM.*processes.*/, 1)
-      end
-
-      context 'with Docker app' do
-        before do
-          FeatureFlag.create(name: 'diego_docker', enabled: true)
-        end
-
-        let!(:docker_process) do
-          ProcessModelFactory.make(:docker, docker_image: 'some-image', state: 'STARTED')
-        end
-
-        context 'when docker is enabled' do
-          before do
-            FeatureFlag.find(name: 'diego_docker').update(enabled: true)
-          end
-
-          it 'returns docker apps' do
-            batch   = runners.diego_apps_cache_data(100, 0)
-            app_ids = batch.pluck(0)
-
-            expect(app_ids).to include(docker_process.id)
-          end
-        end
-
-        context 'when docker is disabled' do
-          before do
-            FeatureFlag.find(name: 'diego_docker').update(enabled: false)
-          end
-
-          it 'does not return docker apps' do
-            batch   = runners.diego_apps_cache_data(100, 0)
-            app_ids = batch.pluck(0)
-
-            expect(app_ids).not_to include(docker_process.id)
-          end
-        end
-      end
-    end
-
-    describe '#latest' do
-      context 'when the input hash includes a key app_guid' do
-        let(:input) do
-          [{
-            app_guid: 'app_guid_1',
-            id: 1
-          }]
-        end
-
-        it 'is added to the hash' do
-          output_hash = runners.latest(input)
-          expect(output_hash['app_guid_1']).to eq(input[0])
-        end
-
-        context 'when the input hash has multiple values' do
-          let(:input) do
-            [
-              {
-                app_guid: 'app_guid_1',
-                id: 1
-              },
-              {
-                app_guid: 'app_guid_2',
-                id: 2
-              }
-            ]
-          end
-
-          it 'adds all items to the hash' do
-            output_hash = runners.latest(input)
-
-            expect(output_hash.length).to eq(input.length)
-            expect(output_hash['app_guid_1']).to eq(input[0])
-            expect(output_hash['app_guid_2']).to eq(input[1])
-          end
-        end
-
-        context 'when multiple items have the same app_guid key' do
-          context 'when the created_at times are the same' do
-            let(:time) { Time.now }
-
-            let(:input) do
-              [
-                {
-                  app_guid: 'app_guid_1',
-                  id: 1,
-                  created_at: time
-                },
-                {
-                  app_guid: 'app_guid_1',
-                  id: 2,
-                  created_at: time
-                }
-              ]
-            end
-
-            it "takes the last entry based off of the 'id'" do
-              output_hash = runners.latest(input)
-              expect(output_hash['app_guid_1']).to eq(input[1])
-            end
-          end
-        end
-      end
-    end
   end
 end