restore one NO COVER pragma

Author: vchudnov-g

google/api_core/operations_v1/abstract_operations_base_client.py

@@ -51,7 +51,7 @@ class AbstractOperationsBaseClientMeta(type):
 
     _transport_registry = OrderedDict()  # type: Dict[str, Type[OperationsTransport]]
     _transport_registry["rest"] = OperationsRestTransport
-    if HAS_ASYNC_REST_DEPENDENCIES:  # try: NO COVER
+    if HAS_ASYNC_REST_DEPENDENCIES:  # pragma: NO COVER
         _transport_registry["rest_asyncio"] = AsyncOperationsRestTransport
 
     def get_transport_class(