Removing some TSan suppressions around Thread class.

Specifically, removing suppressions for:

race:rtc::MessageQueueManager::Clear
race:rtc::Thread::Clear
deadlock:rtc::MessageQueueManager::Clear
deadlock:rtc::MessageQueueManager::ClearInternal

These issues have hopefully been fixed by this and other CLs:
https://webrtc-review.googlesource.com/c/src/+/59466

NOTRY=True

Bug: webrtc:3911, webrtc:4456
Change-Id: I12ce9df0d74381cce4a05e69382029d7fabe2c42
Reviewed-on: https://webrtc-review.googlesource.com/59840
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23689}
diff --git a/tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc b/tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc
index 43a0ac3..7ff65b5 100644
--- a/tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc
+++ b/tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc
@@ -29,16 +29,10 @@
     "race:third_party/libvpx/source/libvpx/vp9/common/vp9_scan.h\n"
 
     // rtc_unittests
-    // https://code.google.com/p/webrtc/issues/detail?id=3911 for details.
-    "race:rtc::MessageQueueManager::Clear\n"
-    "race:rtc::Thread::Clear\n"
     // https://code.google.com/p/webrtc/issues/detail?id=2080
     "race:rtc_base/logging.cc\n"
     "race:rtc_base/sharedexclusivelock_unittest.cc\n"
     "race:rtc_base/signalthread_unittest.cc\n"
-    // https://code.google.com/p/webrtc/issues/detail?id=4456
-    "deadlock:rtc::MessageQueueManager::Clear\n"
-    "deadlock:rtc::MessageQueueManager::ClearInternal\n"
 
     // rtc_pc_unittests
     // https://code.google.com/p/webrtc/issues/detail?id=2079