Removed the 'touch_version.py' runhook in the DEPS file

dart/tools/touch_version.py

Index: dart/tools/touch_version.py
diff --git a/dart/tools/touch_version.py b/dart/tools/touch_version.py
deleted file mode 100644
index 98841fe9d6bdb0463c051a2c086e4f5d2aa61a3a..0000000000000000000000000000000000000000
--- a/dart/tools/touch_version.py
+++ /dev/null
@@ -1,18 +0,0 @@
-# Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-# for details. All rights reserved. Use of this source code is governed by a
-# BSD-style license that can be found in the LICENSE file.
-#
-# This python script "touches" the tools/VERSION file.
-
-import os
-import sys
-
-# Change into the dart directory as we want to be able to access the VERSION file
-# from a simple path.
-runtime_src = os.path.join(os.path.dirname(sys.argv[0]), os.pardir)
-os.chdir(runtime_src)
-
-if __name__ == '__main__':
-  print 'Touching tools/VERSION.'
-  os.utime(os.path.join('tools', 'VERSION'), None)
-  sys.exit(0)