Core/DB Layer: Fix a memory leak.

src/server/worldserver/Master.cpp

@@ -362,8 +362,6 @@ int Master::Run()
 /// Initialize connection to the databases
 bool Master::_StartDB()
 {
-    MySQL::Library_Init();
-
     sLog->SetLogDB(false);
     std::string dbstring;
     uint8 async_threads, synch_threads;