Refactor time helper and remove custom error helper. (#4803)

Co-authored-by: ernestognw <ernestognw@gmail.com>

test/utils/structs/EnumerableSet.test.js

@@ -1,5 +1,6 @@
 const { ethers } = require('hardhat');
 const { loadFixture } = require('@nomicfoundation/hardhat-network-helpers');
+
 const { mapValues } = require('../../helpers/iterate');
 const { randomArray, generators } = require('../../helpers/random');
 const { TYPES } = require('../../../scripts/generate/templates/EnumerableSet.opts');