Remove ffmpeg PGMYUV compatibility hack, which was deprecated since

ages.

The user is requested to specify "-f image2" in place of "-f pgmyuv"
for reading/writing PGMYUV files, as for the other image formats.

Originally committed as revision 25629 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -228,7 +228,6 @@ static uint64_t limit_filesize = 0;
 static int force_fps = 0;
 static char *forced_key_frames = NULL;
 
-static int pgmyuv_compatibility_hack=0;
 static float dts_delta_threshold = 10;
 
 static unsigned int sws_flags = SWS_BICUBIC;
@@ -2652,14 +2651,6 @@ static int transcode(AVFormatContext **output_files,
 
 static void opt_format(const char *arg)
 {
-    /* compatibility stuff for pgmyuv */
-    if (!strcmp(arg, "pgmyuv")) {
-        pgmyuv_compatibility_hack=1;
-//        opt_image_format(arg);
-        arg = "image2";
-        fprintf(stderr, "pgmyuv format is deprecated, use image2\n");
-    }
-
     last_asked_format = arg;
 }
 
@@ -3046,9 +3037,6 @@ static void opt_input_file(const char *filename)
                           avcodec_opts[AVMEDIA_TYPE_SUBTITLE]->strict_std_compliance);
     ic->flags |= AVFMT_FLAG_NONBLOCK;
 
-    if(pgmyuv_compatibility_hack)
-        ic->video_codec_id= CODEC_ID_PGMYUV;
-
     /* open the input file with generic libav function */
     err = av_open_input_file(&ic, filename, file_iformat, 0, ap);
     if (err < 0) {