Revert of Adds bot_update to depot_tools.

infra/recipe_modules/hacky_tryserver_detection/api.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.
-
-from recipe_engine import recipe_api
-
-PATCH_STORAGE_GIT = 'git'
-
-class HackyTryserverDetectionApi(recipe_api.RecipeApi):
-  @property
-  def patch_url(self):
-    """Reads patch_url property and corrects it if needed."""
-    url = self.m.properties.get('patch_url')
-    return url
-
-  @property
-  def is_tryserver(self):
-    """Returns true iff we can apply_issue or patch."""
-    return (self.can_apply_issue or self.is_patch_in_svn or
-            self.is_patch_in_git or self.is_gerrit_issue)
-
-  @property
-  def can_apply_issue(self):
-    """Returns true iff the properties exist to apply_issue from rietveld."""
-    return (self.m.properties.get('rietveld')
-            and 'issue' in self.m.properties
-            and 'patchset' in self.m.properties)
-
-  @property
-  def is_gerrit_issue(self):
-    """Returns true iff the properties exist to match a Gerrit issue."""
-    return ('event.patchSet.ref' in self.m.properties and
-            'event.change.url' in self.m.properties and
-            'event.change.id' in self.m.properties)
-
-  @property
-  def is_patch_in_svn(self):
-    """Returns true iff the properties exist to patch from a patch URL."""
-    return self.patch_url
-
-  @property
-  def is_patch_in_git(self):
-    return (self.m.properties.get('patch_storage') == PATCH_STORAGE_GIT and
-            self.m.properties.get('patch_repo_url') and
-            self.m.properties.get('patch_ref'))
-