gpt-image-2 multi-image + fix: tools need reasoning_effort none on gpt-5.6 (ggg mute bug)

tests/test_bdd_envelope.py

@@ -49,9 +49,6 @@ class FakeModelResponder(AIResponder):
     async def classify(self, message, history_tail):
         return getattr(self, "scripted_classification", None)
 
-    async def translate(self, text: str, language: str = "english") -> str:
-        return text
-
 
 @given(parsers.parse("a responder with history limit {limit:d}"), target_fixture="responder")
 def responder(limit):