Unused wsmap, begone!

- held only reference to wnew0, which was the only consumer
of wmalloc0, safe trip both of them.

WINGs/memory.c

@@ -98,17 +98,6 @@ void *wmalloc(size_t size)
 	return tmp;
 }
 
-void *wmalloc0(size_t size)
-{
-	void *ptr = wmalloc(size);
-	if (!ptr)
-		return NULL;
-
-	memset(ptr, 0, size);
-
-	return ptr;
-}
-
 void *wrealloc(void *ptr, size_t newsize)
 {
 	void *nptr;