Use memcmp instead of vim_memcmp

src/misc2.c

@@ -1408,28 +1408,6 @@ void vim_free(void *x)
   }
 }
 
-#ifdef VIM_MEMCMP
-/*
- * Return zero when "b1" and "b2" are the same for "len" bytes.
- * Return non-zero otherwise.
- */
-int vim_memcmp(b1, b2, len)
-void    *b1;
-void    *b2;
-size_t len;
-{
-  char_u  *p1 = (char_u *)b1, *p2 = (char_u *)b2;
-
-  for (; len > 0; --len) {
-    if (*p1 != *p2)
-      return 1;
-    ++p1;
-    ++p2;
-  }
-  return 0;
-}
-#endif
-
 #if (!defined(HAVE_STRCASECMP) && !defined(HAVE_STRICMP)) || defined(PROTO)
 /*
  * Compare two strings, ignoring case, using current locale.