Remove ancient redir demuxer.

HTTP supports redirection just fine without it.

Originally committed as revision 20361 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/allformats.c

@@ -162,7 +162,6 @@ void av_register_all(void)
     REGISTER_DEMUXER  (QCP, qcp);
     REGISTER_DEMUXER  (R3D, r3d);
     REGISTER_MUXDEMUX (RAWVIDEO, rawvideo);
-    REGISTER_DEMUXER  (REDIR, redir);
     REGISTER_DEMUXER  (RL2, rl2);
     REGISTER_MUXDEMUX (RM, rm);
     REGISTER_MUXDEMUX (ROQ, roq);