Remove mmenke from all watch lists.

Gerrit is too spammy, and there looks to be no plan to fix this.
Getting dozens of emails before an issue is even sent out for review is
just too much of a waste of time.

Bug: none
Change-Id: I338b7c51c18aa07a725cd481d19b254516d5bb74
Reviewed-on: https://chromium-review.googlesource.com/579688Reviewed-by: Randy Smith <rdsmith@chromium.org>
Commit-Queue: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488265}

WATCHLISTS

@@ -769,9 +769,6 @@
     'net_base': {
       'filepath': 'net/base/',
     },
-    'net_error_list': {
-      'filepath': 'net/base/net_error_list.h',
-    },
     'net_http2': {
       'filepath': 'net/http2/',
     },
@@ -1993,10 +1990,8 @@
     'content_bluetooth': ['ortuno+watch@chromium.org',
                           'scheib+watch@chromium.org'],
     'content_loader': ['loading-reviews@chromium.org',
-                       'mmenke@chromium.org',
                        'rdsmith+watch@chromium.org'],
     'content_network': ['asanka@chromium.org',
-                        'mmenke@chromium.org',
                         'rdsmith+watch@chromium.org',
                         'kinuko@chromium.org'],
     'content_renderer': ['mlamouri+watch-content@chromium.org'],
@@ -2155,11 +2150,9 @@
     'net': ['cbentzel+watch@chromium.org',
             'net-reviews@chromium.org'],
     'net_base': ['bnc+watch@chromium.org'],
-    'net_error_list': ['mmenke@chromium.org'],
     'net_http2': ['bnc+watch@chromium.org'],
     'net_log': ['bnc+watch@chromium.org',
-                'eroman@chromium.org',
-                'mmenke@chromium.org'],
+                'eroman@chromium.org'],
     'net_spdy': ['bnc+watch@chromium.org'],
     'netinfo': ['jkarlin+watch@chromium.org'],
     'notifications': ['awdf+watch@chromium.org',