avformat/asfenc: Remove unnecessary header

libavutil/parseutils.h has been included in 22bbd6e8 for av_parse_time()
and the header has not been removed when said function was replaced by
ff_parse_creation_time_metadata() in ea1bf08a.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/asfenc.c

@@ -22,7 +22,6 @@
 #include "libavutil/avassert.h"
 #include "libavutil/dict.h"
 #include "libavutil/mathematics.h"
-#include "libavutil/parseutils.h"
 #include "libavutil/opt.h"
 #include "avformat.h"
 #include "avlanguage.h"