remove some excessive UBSAN workaround

src/lib/ares_sysconfig_mac.c

@@ -310,7 +310,6 @@ static ares_status_t read_resolvers(dns_resolver_t **resolvers, int nresolvers,
 
   for (i = 0; status == ARES_SUCCESS && i < nresolvers; i++) {
     const dns_resolver_t *resolver_ptr;
-    dns_resolver_t        resolver;
 
     /* UBSAN doesn't like that this is unaligned, lets use memcpy to get the
      * address.  Equivalent to:
@@ -318,10 +317,7 @@ static ares_status_t read_resolvers(dns_resolver_t **resolvers, int nresolvers,
      */
     memcpy(&resolver_ptr, resolvers + i, sizeof(resolver_ptr));
 
-    /* UBSAN. If the pointer is misaligned, try to use memcpy to get the data
-     * into a new structure that is hopefully aligned properly */
-    memcpy(&resolver, resolver_ptr, sizeof(resolver));
-    status = read_resolver(&resolver, sysconfig);
+    status = read_resolver(resolver_ptr, sysconfig);
   }
 
   return status;