remove useless/obsolete comments

Originally committed as revision 13205 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/swfdec.c

@@ -22,13 +22,6 @@
 
 #include "swf.h"
 
-/*********************************************/
-/* Extract FLV encoded frame and MP3 from swf
-   Note that the detection of the real frame
-   is inaccurate at this point as it can be
-   quite tricky to determine, you almost certainly
-   will get a bad audio/video sync */
-
 static int get_swf_tag(ByteIOContext *pb, int *len_ptr)
 {
     int tag, len;

libavformat/swfenc.c

@@ -134,7 +134,6 @@ static void put_swf_line_edge(PutBitContext *pb, int dx, int dy)
 
 #define FRAC_BITS 16
 
-/* put matrix */
 static void put_swf_matrix(ByteIOContext *pb,
                            int a, int b, int c, int d, int tx, int ty)
 {
@@ -171,7 +170,6 @@ static void put_swf_matrix(ByteIOContext *pb,
     put_buffer(pb, buf, pbBufPtr(&p) - p.buf);
 }
 
-/* */
 static int swf_write_header(AVFormatContext *s)
 {
     SWFContext *swf = s->priv_data;