Remove katie@chromium from blink_accessibility watchlist.

TBR=dmazzoni@chromium.org

Change-Id: I966d459dbc98f3bb0fe607b20572f66fe006f069
Reviewed-on: https://chromium-review.googlesource.com/1059941Reviewed-by: Katie Dektar <katie@chromium.org>
Commit-Queue: Katie Dektar <katie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558739}

WATCHLISTS

@@ -1757,7 +1757,6 @@
                             'dmazzoni@chromium.org',
                             'dougt+watch@chromium.org',
                             'je_julie.kim@chromium.org',
-                            'katie+watch@chromium.org',
                             'nektar@chromium.org'],
     'blink_animation': ['alexis.menard@intel.com',
                         'blink-reviews-animation@chromium.org',