Revert "[bugfix] Fix PPMissingLayer AttributeError when Using PP" (#21189)

python/sglang/srt/layers/utils/common.py

@@ -59,28 +59,12 @@ class PPMissingLayer(torch.nn.Identity):
     # https://github.com/vllm-project/vllm/blob/18ed3132d2bfe1df9a74729457b69243955221e8/vllm/model_executor/models/utils.py#L468C1-L486C1
     """
     A placeholder layer for missing layers in a pipeline parallel model.
-
-    Attribute access on this placeholder returns 'self' so that common
-    patterns like ``isinstance(layer.mlp, SomeMoE)`` safely evaluate to
-    ``False`` instead of raising ``AttributeError``.
     """
 
     def __init__(self, *args, **kwargs):
         super().__init__()
         self.return_tuple = kwargs.get("return_tuple", False)
 
-    def __getattr__(self, name: str):
-        try:
-            return super().__getattr__(name)
-        except (AttributeError, KeyError):
-            return self
-
-    def __setattr__(self, name: str, value):
-        if name == "return_tuple" or name.startswith("_"):
-            super().__setattr__(name, value)
-        else:
-            pass
-
     def forward(self, *args, **kwargs):
         """
         Return the first arg from args or the first value from kwargs.