Revert "enable fx graph cache on torchbench (#128239)"

Summary:
This reverts commit 734e8f6ad7e7f0fa0341fb658f1f986225173f5f.

Reverted pytorch/pytorch#128239 on behalf of https://github.com/huydhn due to Sorry for reverting your change but it seems to surface a bunch of inductor failures in trunk https://hud.pytorch.org/pytorch/pytorch/commit/734e8f6ad7e7f0fa0341fb658f1f986225173f5f ([comment](pytorch/pytorch#128239 (comment)))

Reviewed By: clee2000

Differential Revision: D58444069

fbshipit-source-id: 031136895b2a19ce20ae3c5c74ec43d925acb218

userbenchmark/dynamo/dynamobench/torchbench.py

@@ -25,10 +25,6 @@
 # We are primarily interested in tf32 datatype
 torch.backends.cuda.matmul.allow_tf32 = True
 
-# Enable FX graph caching
-if "TORCHINDUCTOR_FX_GRAPH_CACHE" not in os.environ:
- torch._inductor.config.fx_graph_cache = True
-
 
 def _reassign_parameters(model):
  # torch_geometric models register parameter as tensors due to