fixes

Signed-off-by: atalman <atalman@fb.com>

Author: atalman

buildkite/pipeline_generator/step.py

@@ -27,20 +27,6 @@ class Step(BaseModel):
     optional: Optional[bool] = False
     no_plugin: Optional[bool] = False
     mirror: Optional[Dict[str, Dict[str, Any]]] = None
-    torch_nightly: Optional[bool] = False
-
-    @model_validator(mode="after")
-    def normalize_torch_nightly_to_mirror(self) -> Self:
-        """Support both `torch_nightly: true` and `mirror: {torch_nightly: {}}`.
-
-        If the legacy `torch_nightly: true` field is set, promote it into the
-        `mirror` dict so the rest of the code only needs to check one place.
-        """
-        if self.torch_nightly:
-            if self.mirror is None:
-                self.mirror = {}
-            self.mirror.setdefault("torch_nightly", {})
-        return self
 
     @model_validator(mode="after")
     def validate_multi_node(self) -> Self: