mpegts: remove unused variable

Signed-off-by: Jean First <jeanfirst@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/mpegts.c

@@ -2132,7 +2132,7 @@ static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
                               int64_t *ppos, int64_t pos_limit)
 {
     MpegTSContext *ts = s->priv_data;
-    int64_t pos, timestamp;
+    int64_t pos;
     pos = ((*ppos  + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
     ff_read_frame_flush(s);
     if (avio_seek(s->pb, pos, SEEK_SET) < 0)