revert c74f28caa7

revert one

node_modules/on-exit-leak-free/test/fixtures/unregister.js

@@ -1,24 +0,0 @@
-'use strict'
-
-const { register, unregister } = require('../..')
-const assert = require('assert')
-
-function setup () {
-  const obj = { foo: 'bar' }
-  register(obj, shutdown)
-  setImmediate(function () {
-    unregister(obj)
-    unregister(obj) // twice, this should not throw
-  })
-}
-
-let shutdownCalled = false
-function shutdown (obj) {
-  shutdownCalled = true
-}
-
-setup()
-
-process.on('exit', function () {
-  assert.strictEqual(shutdownCalled, false)
-})