Remove incorrect usage of av_free_static(), ffmpeg.c is not a

windows dll which can be unloaded and loaded again.

Originally committed as revision 13565 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -392,8 +392,6 @@ static int av_exit(int ret)
     for(i=0;i<nb_input_files;i++)
         av_close_input_file(input_files[i]);
 
-    av_free_static();
-
     av_free(intra_matrix);
     av_free(inter_matrix);