replaced sdl_timer with a qtimer, resulting in a binary which does not link sdl

src/qt/qt.c

@@ -13,8 +13,6 @@
 #include <86box/timer.h>
 #include <86box/nvr.h>
 
-#include "qt_sdl.h"
-
 int qt_nvr_save(void) {
     return nvr_save();
 }