delete invalid import package in windowsystem

Signed-off-by: Nhk_js <hekun18@huawei.com>

graphic/windowstandard/src/main/js/default/test/display.test.js

@@ -14,7 +14,6 @@
  */
 import app from '@system.app'
 import {describe, beforeAll, beforeEach, afterEach, afterAll, it, expect} from 'deccjsunit/index'
-import window from '@ohos.window'
 import display from '@ohos.display'
 
 describe('display_test', function () {

graphic/windowstandard/src/main/js/default/test/window.test.js

@@ -15,7 +15,6 @@
 import app from '@system.app'
 import {describe, beforeAll, beforeEach, afterEach, afterAll, it, expect} from 'deccjsunit/index'
 import window from '@ohos.window'
-import screen from '@ohos.screen'
 import display from '@ohos.display'
 import featureAbility from '@ohos.ability.featureAbility'
 const TRUE_WINDOW = true;