Revert "Arm backend: Add tosa_spec and et-version info to .tosa files (#9308)"

This reverts commit 28673ad.

Author: larryliu0820

backends/arm/test/misc/test_debug_feats.py

@@ -9,7 +9,6 @@
 import shutil
 import tempfile
 import unittest
-from importlib.metadata import version
 
 import torch
 from executorch.backends.arm.test import common
@@ -193,16 +192,15 @@ def test_collate_tosa_BI_tests(self):
             .to_edge_transform_and_lower()
             .to_executorch()
         )
-        et_version = version("executorch")
         # test that the output directory is created and contains the expected files
         assert os.path.exists(
             "test_collate_tosa_tests/tosa-bi/TestCollateTosaTests/test_collate_tosa_BI_tests"
         )
         assert os.path.exists(
-            f"test_collate_tosa_tests/tosa-bi/TestCollateTosaTests/test_collate_tosa_BI_tests/output_tag6_TOSA-0.80+BI_{et_version}.tosa"
+            "test_collate_tosa_tests/tosa-bi/TestCollateTosaTests/test_collate_tosa_BI_tests/output_tag6.tosa"
         )
         assert os.path.exists(
-            f"test_collate_tosa_tests/tosa-bi/TestCollateTosaTests/test_collate_tosa_BI_tests/desc_tag6_TOSA-0.80+BI_{et_version}.json"
+            "test_collate_tosa_tests/tosa-bi/TestCollateTosaTests/test_collate_tosa_BI_tests/desc_tag6.json"
         )
 
         os.environ.pop("TOSA_TESTCASES_BASE_PATH")

backends/arm/tosa_backend.py

@@ -12,7 +12,6 @@
 #
 import logging
 import os
-from importlib.metadata import version
 from typing import cast, final, List
 
 import serializer.tosa_serializer as ts  # type: ignore
@@ -126,12 +125,10 @@ def preprocess(  # noqa: C901
 
         if artifact_path:
             tag = _get_first_delegation_tag(graph_module)
-            et_version = version("executorch")
             dbg_tosa_dump(
                 tosa_graph,
                 artifact_path,
-                suffix="{}".format(f"_{tag}" if tag else "")
-                + (f"_{tosa_spec}" + (f"_{et_version}")),
+                suffix="{}".format(f"_{tag}" if tag else ""),
             )
 
         # Serialize and return the TOSA flatbuffer.