Revert "swscale: pass/calculate sar-info, should fix #7437"

This reverts commit 0330378c.
This reverts commit 0f233f49.

Init() already initializes the aspect ratio, and does it correctly
(unlike these two commits) with video_format_ScaleCropAr().

modules/video_filter/croppadd.c

@@ -190,9 +190,6 @@ static int OpenFilter( vlc_object_t *p_this )
              p_filter->fmt_out.video.i_width,
              p_filter->fmt_out.video.i_height );
 
-    p_filter->fmt_out.video.i_sar_num = p_filter->fmt_in.video.i_sar_num * p_filter->fmt_out.video.i_visible_height;
-    p_filter->fmt_out.video.i_sar_den = p_filter->fmt_in.video.i_sar_den * p_filter->fmt_out.video.i_visible_width;
-
     return VLC_SUCCESS;
 }
 

modules/video_filter/swscale.c

@@ -207,9 +207,6 @@ static int OpenScaler( vlc_object_t *p_this )
              (char *)&p_filter->fmt_out.video.i_chroma,
              ppsz_mode_descriptions[i_sws_mode] );
 
-    p_filter->fmt_out.video.i_sar_num = p_filter->fmt_in.video.i_sar_num * p_filter->fmt_in.video.i_width / p_filter->fmt_out.video.i_width;
-    p_filter->fmt_out.video.i_sar_den = p_filter->fmt_in.video.i_sar_den * p_filter->fmt_in.video.i_height / p_filter->fmt_out.video.i_height;
-
     return VLC_SUCCESS;
 }