Revert of Use src-side launcher for telemetry_unittests in chromium_trybot recipe

scripts/slave/recipes/chromium_trybot.expected/check_swarming_version_failure.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "tryserver.chromium.linux",
       "--builder",
       "linux_chromium_rel_swarming",
@@ skipping 89 matching lines @@
       "@@@STEP_LOG_LINE@json.output@    }@@@",
       "@@@STEP_LOG_LINE@json.output@  ]@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]/src/testing/scripts/get_compile_targets.py",
-      "--output",
-      "/path/to/tmp/json",
-      "--",
-      "--build-config-fs",
-      "Release",
-      "--paths",
-      "{\"build\": \"[BUILD]\"}",
-      "--properties",
-      "{\"buildername\": \"linux_chromium_rel_swarming\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}"
-    ],
-    "name": "get compile targets for scripts",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
-    "cmd": [
-      "python",
-      "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/src/testing/buildbot/trybot_analyze_config.json",
       "/path/to/tmp/json"
     ],
     "name": "read filter exclusion spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: 'testing/buildbot/trybot_analyze_config.json'@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"base\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"exclusions\": [@@@",
@@ skipping 36 matching lines @@
       "@@@STEP_TEXT@0.4.10@@@",
       "@@@STEP_FAILURE@@@"
     ]
   },
   {
     "name": "$final_result",
     "reason": "Step('swarming.py --version') failed with return_code 1",
     "status_code": 1
   }
 ]