decoder/ffmpeg: remove debug code

src/decoder/ffmpeg_decoder_plugin.c

@@ -525,11 +525,6 @@ ffmpeg_decode(struct decoder *decoder, struct input_stream *input)
 	decoder_initialized(decoder, &audio_format,
 			    input->seekable, total_time);
 
-	AVDictionaryEntry *entry =
-		av_dict_get(format_context->metadata, "replaygain_track_gain", NULL, 0);
-	if (entry != NULL)
-		g_printerr("replaygain_track_gain=%s\n", entry->value);
-
 	enum decoder_command cmd;
 	do {
 		AVPacket packet;