Remove abarth from watchlists
https://bugs.webkit.org/show_bug.cgi?id=114390

Reviewed by Ryosuke Niwa.

I'm trying to cut down on the amount of bugmail I get so that I'll have
more of a chance to notice a piece of bugmail directed at me.

* Scripts/webkitpy/common/config/watchlist:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148152 268f45cc-cd09-0410-ab3c-d52691b4dbfc