Delete the suppression for an obsolete bug 23433

tools/valgrind/tsan/suppressions.txt

 # There are a few kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 387 matching lines @@
    ThreadSanitizer:Race
    ...
    fun:std::operator==
    fun:base::SequencedWorkerPool::*
 }
 
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 ############################
 # Real races in Chromium
 {
-  bug_23433
-  ThreadSanitizer:Race
-  fun:*logging*SetMinLogLevel*
-}
-
-{
   bug_24419
   ThreadSanitizer:Race
   fun:*BrowserProcessImpl*nspector*iles*
 }
 
 {
   bug_37496
   ThreadSanitizer:Race
   ...
   fun:*browser_sync*SyncShareIntercept*Observe*
@@ skipping 563 matching lines @@
    ...
    fun:testing::internal::UntypedFunctionMockerBase::UntypedInvokeWith
    fun:testing::internal::FunctionMockerBase::InvokeWith
    fun:testing::internal::FunctionMocker::Invoke
    fun:browser_sync::NewNonFrontendDataTypeControllerMock::RecordUnrecoverableError
    fun:browser_sync::::NewNonFrontendDataTypeControllerFake::RecordUnrecoverableError
    fun:browser_sync::NonFrontendDataTypeController::StartFailed
    fun:browser_sync::NewNonFrontendDataTypeController::StartAssociationWithSharedChangeProcessor
    fun:base::internal::RunnableAdapter::Run
 }