Remove stefan@webrtc.org from libvpx roll notification.

tools/autoroller/roll_chromium_revision.py

 #!/usr/bin/env python
 # Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 """Script to roll chromium_revision in the WebRTC DEPS file."""
@@ skipping 256 matching lines @@
   # are added.
   tbr_authors = ''
   if changed_deps_list:
     commit_msg.append('Changed dependencies:')
 
     for c in changed_deps_list:
       commit_msg.append('* %s: %s/+log/%s..%s' % (c.path, c.url,
                                                   c.current_rev[0:10],
                                                   c.new_rev[0:10]))
       if 'libvpx' in c.path:
-        tbr_authors += 'marpan@webrtc.org, stefan@webrtc.org, '
+        tbr_authors += 'marpan@webrtc.org, '
 
     change_url = CHROMIUM_FILE_TEMPLATE % (rev_interval, 'DEPS')
     commit_msg.append('DEPS diff: %s\n' % change_url)
   else:
     commit_msg.append('No dependencies changed.')
 
   if clang_change.current_rev != clang_change.new_rev:
     commit_msg.append('Clang version changed %s:%s' %
                       (clang_change.current_rev, clang_change.new_rev))
     change_url = CHROMIUM_FILE_TEMPLATE % (rev_interval,
@@ skipping 149 matching lines @@
   _CreateRollBranch(opts.dry_run)
   UpdateDeps(deps_filename, current_cr_rev, new_cr_rev)
   _LocalCommit(commit_msg, opts.dry_run)
   _UploadCL(opts.dry_run, opts.rietveld_email)
   _SendToCQ(opts.dry_run, opts.skip_cq)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())