Remove dead function

Change-Id: If6f25deface628dbc9bc1964a352ab1b8fed1227

aom_dsp/aom_dsp_common.h

@@ -69,10 +69,6 @@ static INLINE int clamp(int value, int low, int high) {
   return value < low ? low : (value > high ? high : value);
 }
 
-static INLINE uint32_t clamp32u(uint32_t value, uint32_t low, uint32_t high) {
-  return value < low ? low : (value > high ? high : value);
-}
-
 static INLINE int64_t clamp64(int64_t value, int64_t low, int64_t high) {
   return value < low ? low : (value > high ? high : value);
 }