Remove unused function `ByteReverse` from util.h

src/util.h

@@ -372,12 +372,6 @@ inline void SetThreadPriority(int nPriority)
 
 void RenameThread(const char* name);
 
-inline uint32_t ByteReverse(uint32_t value)
-{
-    value = ((value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8);
-    return (value<<16) | (value>>16);
-}
-
 // Standard wrapper for do-something-forever thread functions.
 // "Forever" really means until the thread is interrupted.
 // Use it like: