remove PCM options from transcode packages

as it turns out we won't need it

transcode/transcode.go

@@ -41,11 +41,9 @@ var (
 	Opus128       = NewProfile("audio/ogg", "opus", 128, `ffmpeg -v 0 -i <file> -ss <seek> -map 0:a:0 -vn -b:a <bitrate> -c:a libopus -vbr on -f opus -`)
 	Opus128RG     = NewProfile("audio/ogg", "opus", 128, `ffmpeg -v 0 -i <file> -ss <seek> -map 0:a:0 -vn -b:a <bitrate> -c:a libopus -vbr on -af "volume=replaygain=track:replaygain_preamp=6dB:replaygain_noclip=0, alimiter=level=disabled, asidedata=mode=delete:type=REPLAYGAIN" -metadata replaygain_album_gain= -metadata replaygain_album_peak= -metadata replaygain_track_gain= -metadata replaygain_track_peak= -metadata r128_album_gain= -metadata r128_track_gain= -f opus -`)
 	Opus128RGLoud = NewProfile("audio/ogg", "opus", 128, `ffmpeg -v 0 -i <file> -ss <seek> -map 0:a:0 -vn -b:a <bitrate> -c:a libopus -vbr on -af "aresample=96000:resampler=soxr, volume=replaygain=track:replaygain_preamp=15dB:replaygain_noclip=0, alimiter=level=disabled, asidedata=mode=delete:type=REPLAYGAIN" -metadata replaygain_album_gain= -metadata replaygain_album_peak= -metadata replaygain_track_gain= -metadata replaygain_track_peak= -metadata r128_album_gain= -metadata r128_track_gain= -f opus -`)
-
-	PCM16le = NewProfile("audio/wav", "wav", 0, `ffmpeg -v 0 -i <file> -ss <seek> -c:a pcm_s16le -ac 2 -f s16le -`)
 )
 
-type BitRate int // kb/s
+type BitRate uint // kilobits/s
 
 type Profile struct {
 	bitrate BitRate // the default bitrate, but the user can request a different one
@@ -68,6 +66,7 @@ func WithBitrate(p Profile, bitRate BitRate) Profile {
 	p.bitrate = bitRate
 	return p
 }
+
 func WithSeek(p Profile, seek time.Duration) Profile {
 	p.seek = seek
 	return p