Remove myself from all watchlists

I now subscribe to the mailing lists instead.

TBR=chrishtr@chromium.org

Review URL: https://codereview.chromium.org/266703004

git-svn-id: svn://svn.chromium.org/blink/trunk@173218 bbb929c8-8fbe-4397-9dbb-9b2b20218538