Use files in path['checkout'] not resource.

scripts/slave/recipes/chromium.expected/full_chromium_fyi_ClangToTWin_dbg_.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]\\scripts\\slave\\kill_processes.py"
     ],
     "name": "taskkill"
   },
   {
@@ skipping 302 matching lines @@
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json",
       "LLVM_FORCE_HEAD_REVISION": "YES"
     },
     "name": "compile"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "RECIPE_MODULE[build::isolate]\\resources\\remove_build_metadata.py",
+      "[BUILDER_CACHE]\\ClangToTWin_dbg_\\src\\tools\\determinism\\remove_build_metadata.py",
       "--build-dir",
-      "[BUILDER_CACHE]\\ClangToTWin_dbg_\\src\\out\\Debug",
-      "--src-dir",
-      "[BUILDER_CACHE]\\ClangToTWin_dbg_\\src"
+      "[BUILDER_CACHE]\\ClangToTWin_dbg_\\src\\out\\Debug"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "remove_build_metadata"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::isolate]\\resources\\isolate.py",
       "[BUILDER_CACHE]\\ClangToTWin_dbg_\\src\\tools\\swarming_client",
@@ skipping 119 matching lines @@
       "LLVM_FORCE_HEAD_REVISION": "YES"
     },
     "name": "process_dumps"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]