no need of fall back method

Author: shuoweil

tests/system/small/test_anywidget.py

@@ -35,16 +35,6 @@ def cleanup_session(session):
         session.close()
     except Exception as e:
         traceback.print_exception(type(e), e, None)
-        # Try the BigFrames cleanup function as fallback
-        try:
-            import bigframes.pandas as bpd
-
-            bpd.clean_up_by_session_id(
-                session.session_id, location=session._location, project=session._project
-            )
-        except Exception as cleanup_error:
-            print(f"Warning: Fallback cleanup also failed: {cleanup_error}")
-            traceback.print_exception(type(cleanup_error), cleanup_error, None)
 
 
 @pytest.fixture(scope="module")