dv_tablegen: Drop unnecessary av_unused attribute from dv_vlc_map_tableinit().

libavcodec/dv_tablegen.h

@@ -25,7 +25,6 @@
 
 #include <stdint.h>
 
-#include "libavutil/attributes.h"
 #include "dv_vlc_data.h"
 
 #if CONFIG_SMALL
@@ -48,7 +47,7 @@ typedef struct dv_vlc_pair {
 #else
 static struct dv_vlc_pair dv_vlc_map[DV_VLC_MAP_RUN_SIZE][DV_VLC_MAP_LEV_SIZE];
 
-static void av_unused dv_vlc_map_tableinit(void)
+static void dv_vlc_map_tableinit(void)
 {
     int i, j;
     for (i = 0; i < NB_DV_VLC - 1; i++) {