don't try to install conda

(still not available on conda-forge for python 3.13, but also the extra
info from `conda info -a` may not be that important)

Author: keewis

.github/workflows/ci.yaml

@@ -65,7 +65,6 @@ jobs:
           cache-environment-key: "${{runner.os}}-${{runner.arch}}-py${{matrix.python-version}}-${{env.TODAY}}-${{hashFiles(env.CONDA_ENV_FILE)}}"
           create-args: >-
             python=${{matrix.python-version}}
-            conda
 
       - name: Install nightly xarray
         run: |
@@ -75,11 +74,6 @@ jobs:
         run: |
           python -m pip install --no-deps -e .
 
-      - name: Version info
-        run: |
-          conda info -a
-          conda list
-
       - name: Import xarray-array-testing
         run: |
           python -c 'import xarray_array_testing'