Delete git-auto-svn and its docs

fetch_configs/depot_tools.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.
 
 import sys
 
 import config_util  # pylint: disable=F0401
 
 
 # This class doesn't need an __init__ method, so we disable the warning
 # pylint: disable=W0232
 class DepotTools(config_util.Config):
   """Basic Config class for DepotTools."""
 
   @staticmethod
   def fetch_spec(props):
     url = 'https://chromium.googlesource.com/chromium/tools/depot_tools.git'
     solution = {
         'name'        : 'depot_tools',
         'url'         : url,
         'deps_file'   : 'DEPS',
         'managed'     : False,
     }
     spec = {
       'solutions': [solution],
-      'auto': True,
     }
-    checkout_type = 'gclient_git_svn'
-    if props.get('nosvn'):
-      checkout_type = 'gclient_git'
+    checkout_type = 'gclient_git'
     spec_type = '%s_spec' % checkout_type
     return {
       'type': checkout_type,
       spec_type: spec,
     }
 
   @staticmethod
   def expected_root(_props):
     return 'depot_tools'
 
 
 def main(argv=None):
   return DepotTools().handle_args(argv)
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))