Mock client.headers to try to fix test

Author: kimallen

src/registrar/tests/services/test_cloudflare_service.py

@@ -19,15 +19,10 @@ class TestCloudflareService(SimpleTestCase):
     ]
 
     @classmethod
-    def setUpClass(cls):
-        patcher = mock.patch.dict(os.environ, {"DNS_SERVICE_EMAIL": "[email protected]", "DNS_TENANT_KEY": "12345"})
-        patcher.start()
-        cls.addClassCleanup(patcher.stop)
-
-        super().setUpClass()
 
     def setUp(self):
         mock_client = Client()
+        mock_client.headers = Mock()
         mock_client.post = Mock()
         mock_client.get = Mock()
         self.service = CloudflareService(client=mock_client)