Remove legacy SDL2 input grab API

test/testautomation_hints.c

@@ -9,7 +9,6 @@
 static const char *HintsEnum[] = {
     SDL_HINT_FRAMEBUFFER_ACCELERATION,
     SDL_HINT_GAMECONTROLLERCONFIG,
-    SDL_HINT_GRAB_KEYBOARD,
     SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS,
     SDL_HINT_MAC_CTRL_CLICK_EMULATE_RIGHT_CLICK,
     SDL_HINT_MOUSE_RELATIVE_MODE_WARP,
@@ -28,7 +27,6 @@ static const char *HintsEnum[] = {
 static const char *HintsVerbose[] = {
     "SDL_FRAMEBUFFER_ACCELERATION",
     "SDL_GAMECONTROLLERCONFIG",
-    "SDL_GRAB_KEYBOARD",
     "SDL_JOYSTICK_ALLOW_BACKGROUND_EVENTS",
     "SDL_MAC_CTRL_CLICK_EMULATE_RIGHT_CLICK",
     "SDL_MOUSE_RELATIVE_MODE_WARP",