Pad: Set up memory cards via settings

src/duckstation/sdl_interface.cpp

@@ -271,9 +271,6 @@ void SDLInterface::ConnectDevices()
 {
   m_controller = DigitalController::Create();
   m_system->SetController(0, m_controller);
-
-  m_memory_card = MemoryCard::Create();
-  m_system->SetMemoryCard(0, m_memory_card);
 }
 
 std::unique_ptr<SDLInterface> SDLInterface::Create(const char* filename /* = nullptr */,

src/duckstation/sdl_interface.h

@@ -111,7 +111,6 @@ private:
   std::map<int, SDL_GameController*> m_sdl_controllers;
 
   std::shared_ptr<DigitalController> m_controller;
-  std::shared_ptr<MemoryCard> m_memory_card;
 
   float m_vps = 0.0f;
   float m_fps = 0.0f;