Remove unused `alignup` function from util.h

src/util.h

@@ -46,20 +46,6 @@ static const int64_t CENT = 1000000;
 // This is needed because the foreach macro can't get over the comma in pair<t1, t2>
 #define PAIRTYPE(t1, t2)    std::pair<t1, t2>
 
-// Align by increasing pointer, must have extra space at end of buffer
-template <size_t nBytes, typename T>
-T* alignup(T* p)
-{
-    union
-    {
-        T* ptr;
-        size_t n;
-    } u;
-    u.ptr = p;
-    u.n = (u.n + (nBytes-1)) & ~(nBytes-1);
-    return u.ptr;
-}
-
 #ifdef WIN32
 #define MSG_DONTWAIT        0