Remove phi4_mini test from pull target

Author: jackzhxng

.ci/scripts/gather_test_models.py

@@ -90,7 +90,7 @@ def model_should_run_on_event(model: str, event: str) -> bool:
     We put higher priority and fast models to pull request and rest to push.
     """
     if event == "pull_request":
-        return model in ["mv3", "vit", "phi4_mini"]  # TODO: remove
+        return model in ["mv3", "vit"]
     elif event == "push":
         # These are super slow. Only run it periodically
         return model not in ["dl3", "edsr", "emformer_predict"]