Remove TSan suppression that has been fixed by moving plugin dlopen()ing out-of-process.

tools/valgrind/tsan/suppressions.txt

Index: tools/valgrind/tsan/suppressions.txt
diff --git a/tools/valgrind/tsan/suppressions.txt b/tools/valgrind/tsan/suppressions.txt
index 29b762ff6e720398858f2915eecbad57a3a46cd4..ac5617586e2e9df6709b0eaae41eb7df55924841 100644
--- a/tools/valgrind/tsan/suppressions.txt
+++ b/tools/valgrind/tsan/suppressions.txt
@@ -507,25 +507,6 @@
   fun:ThreadWatcherList::InitializeAndStartWatching
 }
 {
-  bug_93757_a
-  ThreadSanitizer:Race
-  fun:__memset_sse2
-  fun:VisitedLinkMaster::CreateURLTable
-}
-{
-  bug_93757_b
-  ThreadSanitizer:Race
-  ...
-  fun:webkit::npapi::PluginLib::ReadWebPluginInfo
-  fun:webkit::npapi::PluginList::ReadPluginInfo
-  fun:webkit::npapi::PluginList::LoadPlugin
-  fun:webkit::npapi::PluginList::LoadPluginsFromDir
-  fun:webkit::npapi::PluginList::LoadPluginsInternal
-  fun:webkit::npapi::PluginList::LoadPlugins
-  fun:webkit::npapi::PluginList::GetPlugins
-  fun:PluginService::GetPluginsInternal
-}
-{
   bug_93932_a
   ThreadSanitizer:Race
   ...