Remove strip_overloads from native_training example.

This is no longer necessary, and the symbol name was changed recently,
causing the build to break:
https://buildkite.com/iree/iree-samples/builds/563#0184e9f1-f3e6-415f-81d7-d9b8d088cb25
diff --git a/samples/native_training/native_training.py b/samples/native_training/native_training.py
index 2e17e82..3020a7b 100644
--- a/samples/native_training/native_training.py
+++ b/samples/native_training/native_training.py
@@ -8,7 +8,6 @@
 import os
 
 import functorch
-from functorch._src.compile_utils import strip_overloads
 import iree_torch
 import torch
 import torch_mlir
@@ -85,10 +84,6 @@
   train_args = (w, b, X_test, y_test)
   graph = functorch.make_fx(train)(*train_args)
 
-  # TODO: Remove once https://github.com/llvm/torch-mlir/issues/1495
-  # is resolved.
-  strip_overloads(graph)
-
   mlir = torch_mlir.compile(graph,
                             train_args,
                             output_type=torch_mlir.OutputType.LINALG_ON_TENSORS)