Revert "SDL: Fix keyrepeat causing thread interruptions"
Revert "SDL: Fix keyrepeat causing thread interruptions"

This reverts commit 932b8117a4d83632534536a8b87b8dafcafefbe0.

libretro/mgba,Iniquitatis/mgba,libretro/mgba,Iniquitatis/mgba,libretro/mgba,mgba-emu/mgba,mgba-emu/mgba,libretro/mgba,Iniquitatis/mgba,libretro/mgba,mgba-emu/mgba,Iniquitatis/mgba,mgba-emu/mgba