refactor(abstract-utxo): inline ScriptType2Of3 type definition

Replace the utxolib.bitgo.outputScripts.ScriptType2Of3 type re-export with
an inline literal union. The values are identical to the utxolib export
('p2sh' | 'p2shP2wsh' | 'p2wsh' | 'p2tr' | 'p2trMusig2').

This removes the last utxolib type reference and the top-level utxolib import
from abstractUtxoCoin.ts.

Refs: T1-3279

Author: OttoAllmendinger

modules/abstract-utxo/src/abstractUtxoCoin.ts

@@ -2,7 +2,6 @@ import assert from 'assert';
 import { randomBytes } from 'crypto';
 
 import _ from 'lodash';
-import * as utxolib from '@bitgo/utxo-lib';
 import { address as wasmAddress, BIP32, fixedScriptWallet, hasPsbtMagic } from '@bitgo/wasm-utxo';
 import {
   AddressCoinSpecific,
@@ -87,7 +86,7 @@ import { isUtxoWalletData, UtxoWallet } from './wallet';
 import { isDescriptorWalletData } from './descriptor/descriptorWallet';
 import type { Unspent } from './unspent';
 
-import ScriptType2Of3 = utxolib.bitgo.outputScripts.ScriptType2Of3;
+type ScriptType2Of3 = 'p2sh' | 'p2shP2wsh' | 'p2wsh' | 'p2tr' | 'p2trMusig2';
 
 export type TxFormat =
   // This is a legacy transaction format based around the bitcoinjs-lib serialization of unsigned transactions
@@ -133,8 +132,6 @@ type UtxoCustomSigningFunction<TNumber extends number | bigint> = {
   }): Promise<SignedTransaction>;
 };
 
-const { ChainCode } = fixedScriptWallet;
-
 /**
  * Check if a decoded transaction has at least one taproot key path spend (MuSig2) input.
  */

modules/abstract-utxo/test/unit/verifyTransaction.ts

@@ -318,10 +318,6 @@ describe('Verify Transaction', function () {
       needsCustomChangeKeySignatureVerification: false,
     });
 
-    const bitcoinMock = sinon
-      .stub(coin, 'createTransactionFromHex')
-      .returns({ ins: [] } as unknown as utxolib.bitgo.UtxoTransaction);
-
     const result = await coin.verifyTransaction({
       txParams: {
         walletPassphrase: passphrase,
@@ -338,7 +334,6 @@ describe('Verify Transaction', function () {
     assert.strictEqual(result, true);
 
     coinMock.restore();
-    bitcoinMock.restore();
   });
 
   it('should reject a bridging transaction whose implicit external output does not match the bridge amount', async () => {