Remove old patch

buildfix_for_old_dav1d.patch

@@ -1,30 +0,0 @@
---- a/modules/codec/dav1d.c
-+++ b/modules/codec/dav1d.c
-@@ -223,7 +223,7 @@
-         if( p_data )
-         {
-             res = dav1d_send_data(p_sys->c, p_data);
--            if (res < 0 && res != DAV1D_ERR(EAGAIN))
-+            if (res < 0 && res != -EAGAIN)
-             {
-                 msg_Err(dec, "Decoder feed error %d!", res);
-                 i_ret = VLC_EGENERIC;
-@@ -248,15 +248,14 @@
-             decoder_QueueVideo(dec, pic);
-             dav1d_picture_unref(&img);
-         }
--        else if (res != DAV1D_ERR(EAGAIN))
-+        else if (res != -EAGAIN)
-         {
-             msg_Warn(dec, "Decoder error %d!", res);
-             break;
-         }
- 
-         /* on drain, we must ignore the 1st EAGAIN */
--        if(!b_draining && (res == DAV1D_ERR(EAGAIN) || res == 0)
--                       && (p_data == NULL||b_eos))
-+        if(!b_draining && (res == -EAGAIN || res == 0) && (p_data == NULL||b_eos))
-         {
-             b_draining = true;
-             res = 0;
-