Remove useless comment.

Originally committed as revision 25129 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/libmp3lame.c

@@ -61,7 +61,6 @@ static av_cold int MP3lame_encode_init(AVCodecContext *avctx)
     if(avctx->flags & CODEC_FLAG_QSCALE) {
         lame_set_brate(s->gfp, 0);
         lame_set_VBR(s->gfp, vbr_default);
-        /* requires lame 3.98 or later */
         lame_set_VBR_quality(s->gfp, avctx->global_quality/(float)FF_QP2LAMBDA);
     }
     lame_set_bWriteVbrTag(s->gfp,0);