alacenc : cosmetics : remove misleading comment

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@18493 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/alacenc.c

@@ -332,7 +332,6 @@ static void write_compressed_frame(AlacEncodeContext *s)
 {
     int i, j;
 
-    /* only simple mid/side decorrelation supported as of now */
     if(s->avctx->channels == 2)
         alac_stereo_decorrelation(s);
     put_bits(&s->pbctx, 8, s->interlacing_shift);