Core/Misc: Multiple static analysis issues fixed (small optimizations and clear code)

src/server/worldserver/RemoteAccess/RASession.cpp

@@ -192,9 +192,7 @@ bool RASession::ProcessCommand(std::string& command)
     }
 
     // Obtain a new promise per command
-    if (_commandExecuting != nullptr)
-        delete _commandExecuting;
-
+    delete _commandExecuting;
     _commandExecuting = new std::promise<void>();
 
     CliCommandHolder* cmd = new CliCommandHolder(this, command.c_str(), &RASession::CommandPrint, &RASession::CommandFinished);