System: Fix incorrect sanitization of memcard filenames

src/core/memory_card.cpp

@@ -36,20 +36,6 @@ MemoryCard::~MemoryCard()
   SaveIfChanged(false);
 }
 
-std::string MemoryCard::SanitizeGameTitleForFileName(const std::string_view& name)
-{
-  std::string ret(name);
-
-  const u32 len = static_cast<u32>(ret.length());
-  for (u32 i = 0; i < len; i++)
-  {
-    if (ret[i] == '\\' || ret[i] == '/' || ret[i] == '?' || ret[i] == '*')
-      ret[i] = '_';
-  }
-
-  return ret;
-}
-
 TickCount MemoryCard::GetSaveDelayInTicks()
 {
   return System::GetTicksPerSecond() * SAVE_DELAY_IN_SECONDS;