chore(Core/Misc): nullptr cleanup (#11467)

src/server/worldserver/Main.cpp

@@ -509,7 +509,7 @@ void ClearOnlineAccounts()
 
 void ShutdownCLIThread(std::thread* cliThread)
 {
-    if (cliThread != nullptr)
+    if (cliThread)
     {
 #ifdef _WIN32
         // First try to cancel any I/O in the CLI thread
@@ -760,7 +760,7 @@ void AuctionListingRunnable()
 
 void ShutdownAuctionListingThread(std::thread* thread)
 {
-    if (thread != nullptr)
+    if (thread)
     {
         thread->join();
         delete thread;