popup: replace FreeType renderer with PangoCairo

popup_layout.c

@@ -1,18 +1,6 @@
 #include "dat.h"
 #include "fn.h"
 
-int
-popupcells(Rune *r, int n)
-{
-	int i, w;
-
-	w = 0;
-	for(i = 0; i < n; i++)
-		if(r[i] != 0xfe0e && r[i] != 0xfe0f)
-			w++;
-	return w;
-}
-
 void
 popupposition(Caret *caret, int pointerx, int pointery, int screenw,
 	int screenh, int w, int h, int *x, int *y)