Clear the closeAuthority on a token account

via-spl-token.ts

import { createSetAuthorityInstruction, AuthorityType } from '@solana/spl-token';
import { Transaction } from '@solana/web3.js';

const instruction = createSetAuthorityInstruction(
  token.publicKey,
  closeAuthority.publicKey,
  AuthorityType.CloseAccount,
  null
);

const transaction = new Transaction().add(instruction);
const { blockhash } = await connection.getLatestBlockhash();
transaction.recentBlockhash = blockhash;
transaction.feePayer = payer.publicKey;
const signature = await connection.sendTransaction(tx, [payer, closeAuthority]);
await connection.confirmTransaction(signature);

via-umi.ts

import { setAuthority, AuthorityType } from '@metaplex-foundation/mpl-essentials';
import { none } from '@metaplex-foundation/umi';

await setAuthority(umi, {
  owned: token.publicKey,
  owner: closeAuthority,
  authorityType: AuthorityType.CloseAccount,
  newAuthority: none(),
}).sendAndConfirm(umi);

// See a working example in the following test:
// https://github.com/metaplex-foundation/mpl-essentials/blob/0650eeda9d7b25bc78f80387859c166ce2232103/clients/js/test/setAuthority.test.ts#L33-L59