Core: Adjust parameter output values to avoid excessive warning outputs on GCC and some other minor warnings

src/server/game/Entities/Unit/Unit.cpp

@@ -16980,7 +16980,7 @@ void Unit::ChangeSeat(int8 seatId, bool next)
         ASSERT(false);
 }
 
-void Unit::ExitVehicle(Position const* exitPosition)
+void Unit::ExitVehicle(Position const* /*exitPosition*/)
 {
     //! This function can be called at upper level code to initialize an exit from the passenger's side.
     if (!m_vehicle)