avformat/asfenc: Remove unused fields from ASFStream

It has never been done in b08569a239,
30b8f3e7dc.

After this change, this muxer does no longer use sizeof(AVPacket).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavformat/asfenc.c

@@ -186,36 +186,11 @@
 #define PACKET_SIZE_MAX 65536
 #define PACKET_SIZE_MIN 100
 
-typedef struct ASFPayload {
-    uint8_t type;
-    uint16_t size;
-} ASFPayload;
-
 typedef struct ASFStream {
     int num;
     unsigned char seq;
-    /* use for reading */
-    AVPacket pkt;
-    int frag_offset;
-    int packet_obj_size;
-    int timestamp;
-    int64_t duration;
-    int skip_to_key;
-    int pkt_clean;
-
-    int ds_span;                /* descrambling  */
-    int ds_packet_size;
-    int ds_chunk_size;
-
-    int64_t packet_pos;
 
     uint16_t stream_language_index;
-
-    int      palette_changed;
-    uint32_t palette[256];
-
-    int payload_ext_ct;
-    ASFPayload payload[8];
 } ASFStream;
 
 typedef struct ASFContext {