Remove tnakamura@ from WATCHLISTS

BUG=None

Review-Url: https://codereview.chromium.org/2327143002
Cr-Commit-Position: refs/heads/master@{#417933}

WATCHLISTS

@@ -1965,8 +1965,7 @@
     'views': ['tfarina@chromium.org'],
     'virtual_keyboard': ['dfaden+virtualkb@google.com',
                          'groby+virtualkb@chromium.org'],
-    'webrtc_browser_tests': ['phoglund+watch@chromium.org',
-                             'tnakamura+watch@chromium.org'],
+    'webrtc_browser_tests': ['phoglund+watch@chromium.org'],
     'website_settings': ['markusheintz@chromium.org',
                          'msramek+watch@chromium.org',
                          'raymes+watch@chromium.org'],