Revert "Avoid to use environment."

scripts/slave/recipes/v8.expected/full_client_v8_V8_Linux64_ASAN.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "client.v8",
       "--builder",
       "V8 Linux64 ASAN",
@@ skipping 290 matching lines @@
       "--gsutil-py-path",
       "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "--ninja-path",
       "RECIPE_PACKAGE_REPO[depot_tools]/ninja",
       "--target",
       "Release",
       "--src-dir",
       "[SLAVE_BUILD]/v8",
       "--goma-cache-dir",
       "[GOMA_CACHE]",
-      "--buildbot-buildername",
-      "V8 Linux64 ASAN",
-      "--buildbot-mastername",
-      "client.v8",
-      "--buildbot-slavename",
-      "TestSlavename",
       "--compiler",
       "goma-clang",
       "--goma-jsonstatus",
       "/path/to/tmp/json",
       "--goma-service-account-json-file",
       "/creds/service_accounts/service-account-goma-client.json",
       "--goma-dir",
       "[CACHE]/cipd/goma",
       "--"
     ],
@@ skipping 667 matching lines @@
     "~followup_annotations": [
       "@@@STEP_TEXT@V8 Linux ASAN arm - debug builder<br />V8 Linux ASAN mipsel - debug builder<br />V8 Linux64 ASAN - debug builder<br />V8 Linux64 ASAN arm64 - debug builder<br />V8 Linux64 ASAN no inline - release builder@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]