chore: address review comments

Author: hebaalazzeh

packages/google-api-core/google/api_core/gapic_v1/__init__.py

@@ -25,11 +25,10 @@
 # Older Python versions safely ignore this variable.
 __lazy_modules__: Set[str] = {
     "google.api_core.gapic_v1.client_info",
-    "google.api_core.gapic_v1.client_utils",
     "google.api_core.gapic_v1.requests",
     "google.api_core.gapic_v1.routing_header",
 }
-__all__ = ["client_info", "client_utils", "requests", "routing_header"]
+__all__ = ["client_info", "requests", "routing_header"]
 
 
 if _has_grpc:
@@ -44,7 +43,6 @@
 
 from google.api_core.gapic_v1 import (  # noqa: E402
     client_info,
-    client_utils,
     requests,
     routing_header,
 )

packages/google-api-core/google/api_core/gapic_v1/client_utils.py

@@ -25,7 +25,6 @@ def mock_mtls_env():
         os.environ,
         {
             "GOOGLE_API_USE_CLIENT_CERTIFICATE": "false",
-            "CLOUDSDK_CONTEXT_AWARE_USE_CLIENT_CERTIFICATE": "false",
         },
     ):
         yield