Fixing a lint error; Fixing a regression caused by googleapis/google-auth-library-python#324

Author: hiranya911

snippets/auth/index.py

@@ -635,7 +635,9 @@ def sign_in_with_email_link():
     # [END sign_in_with_email_link]
 
 def send_custom_email(email, display_name, link):
-    pass
+    del email
+    del display_name
+    del link
 
 initialize_sdk_with_service_account()
 initialize_sdk_with_application_default()

tests/test_token_gen.py

@@ -207,7 +207,7 @@ def test_sign_with_iam(self):
             iam_resp = '{{"signature": "{0}"}}'.format(signature)
             _overwrite_iam_request(app, testutils.MockRequest(200, iam_resp))
             custom_token = auth.create_custom_token(MOCK_UID, app=app).decode()
-            assert custom_token.endswith('.' + signature)
+            assert custom_token.endswith('.' + signature.rstrip('='))
             self._verify_signer(custom_token, 'test-service-account')
         finally:
             firebase_admin.delete_app(app)
@@ -241,7 +241,7 @@ def test_sign_with_discovered_service_account(self):
             request.response = testutils.MockResponse(
                 200, '{{"signature": "{0}"}}'.format(signature))
             custom_token = auth.create_custom_token(MOCK_UID, app=app).decode()
-            assert custom_token.endswith('.' + signature)
+            assert custom_token.endswith('.' + signature.rstrip('='))
             self._verify_signer(custom_token, 'discovered-service-account')
             assert len(request.log) == 2
             assert request.log[0][1]['headers'] == {'Metadata-Flavor': 'Google'}