Remove kochi from script WATCHLISTS

Remove myself from script WATCHLISTS.

TBR=kouhei@chromium.org
NOTRY=true

Change-Id: I64ce436981cbf3c3882dc4207d286b27d00534f1
Reviewed-on: https://chromium-review.googlesource.com/1142859Reviewed-by: Takayoshi Kochi <kochi@chromium.org>
Commit-Queue: Takayoshi Kochi <kochi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576363}

WATCHLISTS

@@ -1882,8 +1882,7 @@
     'blink_scheduler': ['scheduler-bugs+blink@chromium.org'],
     'blink_screen_orientation': ['mlamouri+watch-blink@chromium.org'],
     'blink_script': ['kouhei+script@chromium.org',
-                     'hiroshige+script@chromium.org',
-                     'kochi+script@chromium.org'],
+                     'hiroshige+script@chromium.org'],
     'blink_scroll': ['bokan@chromium.org'],
     'blink_service_worker': ['falken+watch@chromium.org',
                              'horo+watch@chromium.org',