Remove self from cast and tab capture watchlists.

TBR=wez

Bug: 
Change-Id: I3016dea4130a0020158cb5d0ff610b6c4fa19268
Reviewed-on: https://chromium-review.googlesource.com/541897Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Commit-Queue: mark a. foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#481034}

WATCHLISTS

@@ -1904,7 +1904,6 @@
              'imcheng+watch@chromium.org',
              'isheriff+watch@chromium.org',
              'jasonroberts+watch@google.com',
-             'mfoltz+watch@chromium.org',
              'miu+watch@chromium.org',
              'xjz+watch@chromium.org'],
     'cast_certificate': ['dougsteed+watch@chromium.org',
@@ -2225,8 +2224,7 @@
                'nhiroki@chromium.org',
                'tzik@chromium.org'],
     'tab_alert_indicators': ['miu+watch@chromium.org'],
-    'tab_capture': ['mfoltz+watch@chromium.org',
-                    'miu+watch@chromium.org',
+    'tab_capture': ['miu+watch@chromium.org',
                     'xjz+watch@chromium.org'],
     'tab_contents': ['ajwong+watch@chromium.org',
                      'avi@chromium.org',