avformat/movenc: remove unneeded #include, there are no assert() only av_assert*

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavformat/movenc.c

@@ -48,9 +48,6 @@
 #include "rtpenc.h"
 #include "mov_chan.h"
 
-#undef NDEBUG
-#include <assert.h>
-
 static const AVOption options[] = {
     { "movflags", "MOV muxer flags", offsetof(MOVMuxContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
     { "rtphint", "Add RTP hint tracks", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_RTP_HINT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },