Revert "[python] Add mock API tests for service/multiple-services Spector scenario" (#10335)

Reverts #10258

There may be bug in generated sdk code and let us revert it for now
Azure/autorest.python#3433

Author: msyyc

.chronus/changes/python-add-test-service-multiple-services-2026-4-2-22-40-0.md

@@ -135,9 +135,6 @@ export const BASE_AZURE_EMITTER_OPTIONS: Record<
   "service/multi-service": {
     namespace: "service.multiservice",
   },
-  "service/multiple-services": {
-    namespace: "service.multipleservices",
-  },
 };
 
 export const BASE_EMITTER_OPTIONS: Record<