Revert of Adds bot_update to depot_tools.

infra/recipe_modules/hacky_tryserver_detection/example.py

Index: infra/recipe_modules/hacky_tryserver_detection/example.py
diff --git a/infra/recipe_modules/hacky_tryserver_detection/example.py b/infra/recipe_modules/hacky_tryserver_detection/example.py
deleted file mode 100644
index 2187add0b08fba47f3c803b7d0070d2cc2fc464e..0000000000000000000000000000000000000000
--- a/infra/recipe_modules/hacky_tryserver_detection/example.py
+++ /dev/null
@@ -1,17 +0,0 @@
-# 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.
-
-DEPS = [
-  'recipe_engine/step',
-  'hacky_tryserver_detection',
-]
-
-
-def RunSteps(api):
-  api.step(
-      "am i a tryserver?", ['echo', api.hacky_tryserver_detection.is_tryserver])
-
-
-def GenTests(api):
-  yield api.test('basic')