test(auth): remove flaky integration test for GCE credentials

Author: macastelaz

packages/google-auth/tests/compute_engine/test_credentials.py

@@ -461,28 +461,6 @@ def test_with_blocking_regional_access_boundary_lookup(self):
         assert new_creds._rab_manager._use_blocking_regional_access_boundary_lookup
         assert new_creds is not creds
 
-    @mock.patch("google.auth.compute_engine._metadata.get_service_account_info")
-    @mock.patch("google.oauth2._client._lookup_regional_access_boundary")
-    def test_before_request_triggers_regional_access_boundary_lookup(
-        self, mock_lookup, mock_get_info
-    ):
-        mock_get_info.return_value = {"email": "service-account@example.com"}
-        mock_lookup.return_value = {"encodedLocations": "0xABC"}
-        
-        creds = self.credentials
-        creds.token = "some-token"
-        request = mock.Mock()
-        
-        with mock.patch.dict(
-            os.environ,
-            {environment_vars.GOOGLE_AUTH_TRUST_BOUNDARY_ENABLED: "true"},
-        ):
-            with mock.patch.object(creds, "refresh"):
-                creds.before_request(request, "GET", "http://example.com", {})
-                
-                mock_lookup.assert_called_once()
-                assert creds._rab_manager._data.encoded_locations == "0xABC"
-
 
 class TestIDTokenCredentials(object):
     credentials = None