Fix python 3.11 test coverage issues (#512)

Author: leszekhanusz

gql/transport/aiohttp.py

@@ -147,7 +147,7 @@ def connection_lost(exc, orig_lost):
                     all_is_lost.set()
 
         def eof_received(orig_eof_received):
-            try:
+            try:  # pragma: no cover
                 orig_eof_received()
             except AttributeError:  # pragma: no cover
                 # It may happen that eof_received() is called after

gql/transport/phoenix_channel_websockets.py

@@ -342,9 +342,8 @@ def _validate_data_response(d: Any, label: str) -> dict:
 
                 elif status == "timeout":
                     raise TransportQueryError("reply timeout", query_id=answer_id)
-                else:
-                    # missing or unrecognized status, just continue
-                    pass
+
+                # In case of missing or unrecognized status, just continue
 
             elif event == "phx_error":
                 # Sent if the channel has crashed