Drop fuchsia from clang roll trybot list.

The bot no longer exists by this name, and there's a fuchsia bot on
the regular CQ now anyway.

Bug: 
Change-Id: I4187b9de545ae36acccc38f719e9718136c1e353
Reviewed-on: https://chromium-review.googlesource.com/749622
Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Peter Collingbourne <pcc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513236}
1 file changed