remove unused all_generator_source from generate_code (#75868)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75868

This is unused in OSS and internally.
ghstack-source-id: 154696014

Test Plan: I manually verified it is unused and am relying on CI to confirm.

Reviewed By: dreiss

Differential Revision: D35674693

fbshipit-source-id: 945ec0590e9d939eab8944ae48bae72cb61e6261
(cherry picked from commit 01a29161b0a3b386078df3cd081358786a6d8f53)

tools/setup_helpers/generate_code.py

@@ -3,7 +3,7 @@ import os
 import pathlib
 import sys
 import yaml
-from typing import Any, List, Optional, cast
+from typing import Any, Optional, cast
 
 try:
     # use faster C loader if available
@@ -11,22 +11,8 @@ try:
 except ImportError:
     from yaml import SafeLoader as YamlLoader  # type: ignore[misc]
 
-source_files = {".py", ".cpp", ".h"}
-
 NATIVE_FUNCTIONS_PATH = "aten/src/ATen/native/native_functions.yaml"
 
-# TODO: This is a little inaccurate, because it will also pick
-# up setup_helper scripts which don't affect code generation
-def all_generator_source() -> List[str]:
-    r = []
-    for directory, _, filenames in os.walk("tools"):
-        for f in filenames:
-            if os.path.splitext(f)[1] in source_files:
-                full = os.path.join(directory, f)
-                r.append(full)
-    return sorted(r)
-
-
 def generate_code(
     ninja_global: Optional[str] = None,
     native_functions_path: Optional[str] = None,