Remove data race suppressions for issue 290964, which is long fixed.

BUG=290964
TBR=yangguo@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/763333002

Cr-Original-Commit-Position: refs/heads/master@{#307226}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: e0ff7ffb32af039c6711e7bcf0cdd962bbb4a3a9

sanitizers/tsan_suppressions.cc

@@ -149,10 +149,6 @@ char kTSanDefaultSuppressions[] =
 // http://crbug.com/285242
 "race:media::PulseAudioOutputStream::SetVolume\n"
 
-// http://crbug.com/290964
-"race:PostponeInterruptsScope\n"
-"race:v8::internal::StackGuard::RequestInstallCode\n"
-
 // http://crbug.com/296883
 "race:net::URLFetcherCore::Stop\n"