--- rxvt-unicode/src/rxvtutil.h	2014/11/12 12:12:02	1.62
+++ rxvt-unicode/src/rxvtutil.h	2014/12/14 04:52:10	1.63
@@ -24,8 +24,6 @@
 template<typename T, typename U, typename V> static inline T    clamp    (T  v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; }
 template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) {    v = v < (T)a ? a : v >(T)b ? b : v; }
 
-template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); }
-
 // linear interpolation
 template<typename T, typename U, typename P>
 static inline T