Revert "[dynamo] add sourceless builder for types.MethodType (#147880)"

This reverts commit 08f4c1a233.

Reverted https://github.com/pytorch/pytorch/pull/147880 on behalf of https://github.com/wdvr due to failing trunk tests ([comment](https://github.com/pytorch/pytorch/pull/147880#issuecomment-2686436432))

test/dynamo/test_functions.py

@@ -2071,18 +2071,6 @@ class FunctionTests(torch._dynamo.test_case.TestCase):
         mytuple.z = a
         return hasattr(mytuple, "x"), mytuple.x + mytuple.y, mytuple.z
 
-    @make_test
-    def test_sourceless_build_method_type(a, b):
-        cls = collections.namedtuple("Foo", ["x", "y"])  # sourceless variable
-
-        # The type of `cls._make` and `cls._asdict` is method type
-        if callable(getattr(cls, "_make", None)) and callable(
-            getattr(cls, "_asdict", None)
-        ):
-            return a + b
-        else:
-            return a - b
-
     @make_test
     def test_torch_size_hasattr(x):
         if hasattr(x.shape, "_fields"):

torch/_dynamo/variables/builder.py

@@ -3060,15 +3060,6 @@ class SourcelessBuilder:
             return UserDefinedClassVariable(value)
         elif isinstance(value, types.MethodWrapperType):
             return MethodWrapperVariable(value)
-        elif (
-            isinstance(value, types.MethodType)
-            # We only support sourceless class objects
-            # An instance variable is not allowed and it should have source
-            and isinstance(value.__self__, (type, abc.ABCMeta))
-        ):
-            assert getattr(value.__self__, value.__func__.__name__) == value
-            cls_obj_vt = SourcelessBuilder.create(tx, value.__self__)
-            return cls_obj_vt.var_getattr(tx, value.__func__.__name__)
         elif isinstance(value, torch.fx.graph_module.GraphModule):
             return SourcelessGraphModuleVariable(value)
         elif isinstance(