Removed SDL_HINT_ACCELEROMETER_AS_JOYSTICK

Sensors are a first-class object in SDL and we haven't gotten any feedback that this feature is useful these days.

Closes https://github.com/libsdl-org/SDL/pull/7879

docs/README-migration.md

@@ -703,6 +703,7 @@ SDL_AddHintCallback() now returns a standard int result instead of void, returni
 Calling SDL_GetHint() with the name of the hint being changed from within a hint callback will now return the new value rather than the old value. The old value is still passed as a parameter to the hint callback.
 
 The following hints have been removed:
+* SDL_HINT_ACCELEROMETER_AS_JOYSTICK
 * SDL_HINT_GAMECONTROLLER_USE_BUTTON_LABELS - gamepad buttons are always positional
 * SDL_HINT_IDLE_TIMER_DISABLED - use SDL_DisableScreenSaver instead
 * SDL_HINT_IME_SUPPORT_EXTENDED_TEXT - the normal text editing event has extended text