remove: drop Wayland frontend

dat.h

@@ -28,7 +28,6 @@ enum
 	Maxclients	= 64,
 	Maxkouho	= 32,
 	Maxdisp		= 9,
-	Wlkeymax	= 0x300,
 	Imgw		= (Maxrunes + 3) * Fontsz,
 	Imgh		= (Maxdisp + 1) * Fontsz,
 
@@ -44,17 +43,6 @@ struct Str
 	int	n;
 };
 
-typedef struct Wlstate Wlstate;
-struct Wlstate
-{
-	uchar	down[Wlkeymax];
-	u32int	repeatkey;
-	uvlong	repeatat;
-	int	rate;
-	int	delay;
-	int	repeating;
-};
-
 typedef struct Emit Emit;
 struct Emit
 {