fix: remove buggy node polyfill plugin (#18531)

* fix: remove buggy node polyfill plugin

* fix websocket test

* remove assert dependency

web3.js/src/transaction.ts

@@ -1,4 +1,3 @@
-import invariant from 'assert';
 import nacl from 'tweetnacl';
 import bs58 from 'bs58';
 import {Buffer} from 'buffer';
@@ -7,6 +6,7 @@ import {Message} from './message';
 import {PublicKey} from './publickey';
 import * as shortvec from './util/shortvec-encoding';
 import {toBuffer} from './util/to-buffer';
+import invariant from './util/assert';
 import type {Signer} from './keypair';
 import type {Blockhash} from './blockhash';
 import type {CompiledInstruction} from './message';