[eric] agents: drop the unreachable 504 branch; the manager already swallows an aux timeout and returns a fallback group meta

backend/apps/agents/agents.py

@@ -268,12 +268,6 @@ async def generate_group_meta(session_id: str, body: dict):
         if not future.done():
             future.set_result(result)
         return result
-    except asyncio.TimeoutError as e:
-        # A raw TimeoutError would bubble past the CORS layer as a headerless 500, which the
-        # renderer console mislabels as a CORS violation; a 504 keeps the failure legible.
-        if not future.done():
-            future.set_exception(e)
-        raise HTTPException(status_code=504, detail="metadata generation timed out") from e
     except Exception as e:
         if not future.done():
             future.set_exception(e)