Update WATCHLISTS.

Removes rhalavati@ from clang_update watch lists.

Change-Id: Icf5b347249ce10faef5c4c40f971b8403bc20462
Reviewed-on: https://chromium-review.googlesource.com/1158690Reviewed-by: Christian Dullweber <dullweber@chromium.org>
Commit-Queue: Ramin Halavati <rhalavati@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579804}

WATCHLISTS

@@ -2025,7 +2025,6 @@
                      'hans@chromium.org',
                      'ibiryukov@google.com',
                      'pcc@chromium.org',
-                     'rhalavati@chromium.org',
                      'rnk@chromium.org',
                      'thakis@chromium.org',
                      'thestig@chromium.org',