Remove alancutter@chromium.org from animations watchlist

Following blink-reviews-animation group instead now.

TBR=timloh@chromium.org
NOTRY=TRUE

Review URL: https://codereview.chromium.org/270513004

git-svn-id: svn://svn.chromium.org/blink/trunk@173466 bbb929c8-8fbe-4397-9dbb-9b2b20218538