Remove amp recipe module and related code (unused)

scripts/slave/recipe_modules/amp/config.py

-# Copyright 2015 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.
-
-from recipe_engine.config import config_item_context, ConfigGroup
-from recipe_engine.config import Single
-
-GS_BASE_URL = 'gs://chrome-amp-keys'
-
-def BaseConfig(**_kwargs):
-  return ConfigGroup(
-    pool = Single(basestring),
-    api_key_file_url = Single(basestring),
-    api_secret_file_url = Single(basestring),
-  )
-
-config_ctx = config_item_context(BaseConfig)
-
-@config_ctx()
-def main_pool(c):
-  SetDevicePoolConfigs(c, 'main_pool')
-
-@config_ctx()
-def commit_queue_pool(c):
-  SetDevicePoolConfigs(c, 'commit_queue_pool')
-
-@config_ctx()
-def webview_pool(c):  # pragma: no cover
-  SetDevicePoolConfigs(c, 'webview_pool')
-
-@config_ctx()
-def low_end_pool(c):  # pragma: no cover
-  SetDevicePoolConfigs(c, 'low_end_pool')
-
-def SetDevicePoolConfigs(c, pool_name):
-  c.pool = pool_name
-  c.api_key_file_url = '%s/%s/%s' % (GS_BASE_URL, pool_name, 'api_key')
-  c.api_secret_file_url = '%s/%s/%s' % (GS_BASE_URL, pool_name, 'api_secret')