Revert of Cross-repo recipe package system.

scripts/slave/recipe_modules/webrtc/builders.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Contains the bulk of the WebRTC builder configurations so they can be reused
 # from multiple recipes.
 
-from recipe_engine.types import freeze
+from infra.libs.infra_types import freeze
 
 RECIPE_CONFIGS = freeze({
   'webrtc': {
     'chromium_config': 'webrtc_standalone',
     'gclient_config': 'webrtc',
     'test_suite': 'webrtc',
   },
   'webrtc_baremetal': {
     'chromium_config': 'webrtc_standalone',
     'gclient_config': 'webrtc',
@@ skipping 1399 matching lines @@
           'TARGET_BITS': 32,
         },
         'chromium_apply_config': ['webrtc_gn'],
         'bot_type': 'builder',
         'testing': {'platform': 'linux'},
       },
     },
   },
 })