Revert r15653.

Was "Copy pts for each raw encoded frame."
It causes problems as timestamps management when video sync is zero needs
rework in ffmpeg.c.

Originally committed as revision 15669 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/rawenc.c

@@ -40,7 +40,6 @@ static av_cold int raw_init_encoder(AVCodecContext *avctx)
 static int raw_encode(AVCodecContext *avctx,
                             unsigned char *frame, int buf_size, void *data)
 {
-    avctx->coded_frame->pts = ((AVFrame *)data)->pts;
     return avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
                                                avctx->height, frame, buf_size);
 }