Drop the two ICU entries from Tsan suppresion list

ICU 63.1 fixed it and v8's ICU was rolled to ICU 63.1

TBR=sigurds@chromium.org

Bug: v8:8110
Change-Id: Ic44c8f4293d6d39b597a90318f0acbf5aea6eccf
Reviewed-on: https://chromium-review.googlesource.com/c/1316615Reviewed-by: Jungshik Shin <jshin@chromium.org>
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57227}

tools/sanitizers/tsan_suppressions.txt

@@ -4,8 +4,3 @@
 # Incorrectly detected lock cycles in test-lockers
 # https://code.google.com/p/thread-sanitizer/issues/detail?id=81
 deadlock:LockAndUnlockDifferentIsolatesThread::Run
-
-# Data race in a third party lib
-# https://bugs.chromium.org/p/v8/issues/detail?id=8110
-race:IndianCalendar::fgSystemDefaultCenturyStartYear
-race:IndianCalendar::fgSystemDefaultCenturyStart