tests: fix memory leaks (#2389)

packages/snjs/mocha/item_manager.test.js

@@ -1,5 +1,3 @@
-/* eslint-disable no-unused-expressions */
-/* eslint-disable no-undef */
 import * as Factory from './lib/factory.js'
 import { BaseItemCounts } from './lib/BaseItemCounts.js'
 
@@ -10,11 +8,6 @@ describe('item manager', function () {
   let context
   let application
 
-  afterEach(async function () {
-    await context.deinit()
-    localStorage.clear()
-  })
-
   beforeEach(async function () {
     localStorage.clear()
 
@@ -24,6 +17,14 @@ describe('item manager', function () {
     await context.launch()
   })
 
+  afterEach(async function () {
+    await context.deinit()
+    localStorage.clear()
+
+    context = undefined
+    application = undefined
+  })
+
   const createNote = async () => {
     return application.mutator.createItem(ContentType.TYPES.Note, {
       title: 'hello',