Remove sdefresne@ from ios_chrome WATCHLIST.

WATCHLISTS

 # Copyright (c) 2012 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.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 # IMPORTANT: The regular expression filepath is tested against each path using
 # re.search, so it is not usually necessary to add .*.
 
@@ skipping 1990 matching lines @@
                 'donnd+watch@chromium.org',
                 'jered@chromium.org',
                 'jfweitz+watch@chromium.org',
                 'kmadhusu+watch@chromium.org',
                 'melevin+watch@chromium.org',
                 'samarth+watch@chromium.org',
                 'skanuj+watch@chromium.org'],
     'ios': ['ios-reviews@chromium.org'],
     'ios_chrome': ['ios-reviews+chrome@chromium.org',
                    'pkl@chromium.org',
-                   'sdefresne+watch@chromium.org',
                    'noyau+watch@chromium.org',
                    'marq+watch@chromium.org'],
     'ios_clean': ['ios-reviews+clean@chromium.org',
                   'marq+scrutinize@chromium.org',
                   'lpromero+watch@chromium.org'],
     'ios_showcase': ['ios-reviews+showcase@chromium.org',
                      'marq+watch@chromium.org',
                      'lpromero+watch@chromium.org'],
     'ios_test': ['baxley+watch@chromium.org',
                  'huangml+watch@chromium.org',
@@ skipping 216 matching lines @@
                          'msramek+watch@chromium.org',
                          'raymes+watch@chromium.org'],
     'windows_sandboxing': ['pennymac+watch@chromium.org',
                            'wfh+watch@chromium.org'],
     'x11': ['derat+watch@chromium.org',
             'sadrul@chromium.org',
             'yusukes+watch@chromium.org'],
     'zoom': ['wjmaclean@chromium.org'],
   },
 }