libmpcodecs: remove unused and half existing vo_fs variable

It breaks linking with suncc sometimes
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/libmpcodecs/libvo/video_out.h

@@ -221,7 +221,6 @@ extern int vo_grabpointer;
 extern int vo_doublebuffering;
 extern int vo_directrendering;
 extern int vo_vsync;
-extern int vo_fs;
 extern int vo_fsmode;
 extern float vo_panscan;
 extern int vo_adapter_num;
@@ -279,9 +278,4 @@ void calc_src_dst_rects(int src_width, int src_height, struct vo_rect *src, stru
                         struct vo_rect *borders, const struct vo_rect *crop);
 void vo_mouse_movement(int posx, int posy);
 
-static inline int aspect_scaling(void)
-{
-  return vo_fs;
-}
-
 #endif /* MPLAYER_VIDEO_OUT_H */