Update crypto-browser.js to use crypto.js implementation.

Author: msporny

lib/crypto-browser.js

@@ -1,7 +1,4 @@
 /*!
  * Copyright (c) 2023-2026 Digital Bazaar, Inc. All rights reserved.
  */
-// eslint-disable-next-line no-undef
-export const webcrypto = globalThis.crypto;
-// eslint-disable-next-line no-undef
-export const CryptoKey = globalThis.CryptoKey ?? webcrypto.CryptoKey;
+export {webcrypto, CryptoKey} from './crypto.js';