Add LyricsOneReverse. Remove unused and duplicate metrics.

stepmania/Themes/default/metrics.ini

@@ -739,8 +739,6 @@ LifeFrameExtraX=320
 LifeFrameExtraY=442
 LifeFrameExtraOnCommand=addy,100;sleep,0.5;linear,1;addy,-100
 LifeFrameExtraOffCommand=linear,1;addy,100
-LyricsX=320 // this point is the center of the text line
-LyricsY=370
 ScoreFrameX=320
 ScoreFrameY=448
 ScoreFrameOnCommand=addy,100;sleep,0.5;linear,1;addy,-100
@@ -865,16 +863,9 @@ LyricsX=320
 LyricsY=400
 LyricsReverseX=320
 LyricsReverseY=100
-LyricsReverseOnCommand=
-LyricsReverseOffCommand=
-LyricsExtraX=320
-LyricsExtraY=400
-LyricsExtraOnCommand=
-LyricsExtraOffCommand=
-LyricsExtraReverseX=320
-LyricsExtraReverseY=400
-LyricsExtraReverseOnCommand=
-LyricsExtraReverseOffCommand=
+# This is used if one player is in reverse and the other isn't.
+LyricsOneReverseX=320
+LyricsOneReverseY=35
 ActiveItemsP1X=0
 ActiveItemsP1Y=0
 ActiveItemsP1OnCommand=