ubifs: switch_gc_head: Remove redondant sync of wbuf

The wbuf is already sync-ed before ubifs_leb_unmap()
Signed-off-by: Sylvain Etienne <seti@dadboo.eu>
Acked-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

fs/ubifs/gc.c

@@ -100,10 +100,6 @@ static int switch_gc_head(struct ubifs_info *c)
 	if (err)
 		return err;
 
-	err = ubifs_wbuf_sync_nolock(wbuf);
-	if (err)
-		return err;
-
 	err = ubifs_add_bud_to_log(c, GCHD, gc_lnum, 0);
 	if (err)
 		return err;