lib: apply minor dtls cleanups

Signed-off-by: James M Snell <jasnell@gmail.com>
PR-URL: nodejs#63539
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

Author: jasnell

lib/dtls.js

@@ -1,10 +1,5 @@
 'use strict';
 
-const {
-  ObjectCreate,
-  ObjectSeal,
-} = primordials;
-
 const {
   emitExperimentalWarning,
 } = require('internal/util');
@@ -17,20 +12,9 @@ const {
   DTLSSession,
 } = require('internal/dtls/dtls');
 
-function getEnumerableConstant(value) {
-  return {
-    __proto__: null,
-    value,
-    enumerable: true,
-    configurable: false,
-    writable: false,
-  };
-}
-
-module.exports = ObjectSeal(ObjectCreate(null, {
-  __proto__: null,
-  connect: getEnumerableConstant(connect),
-  listen: getEnumerableConstant(listen),
-  DTLSEndpoint: getEnumerableConstant(DTLSEndpoint),
-  DTLSSession: getEnumerableConstant(DTLSSession),
-}));
+module.exports = {
+  connect,
+  listen,
+  DTLSEndpoint,
+  DTLSSession,
+};