!766 sync cases from master to lts

Merge pull request !766 from 杨清/cherry-pick-1632655666

global/i18n_standard/intljs/src/main/js/default/test/I18n.test.js

@@ -553,7 +553,6 @@ describe('I18nTest', function () {
     it('i18n_test_3900', 0, function () {
         let value = I18n.getDisplayCountry('zh', 'en-US', true);
         console.log('i18n_test_3900 ' + value);
-        expect(value).assertNull();
         expect(value).assertEqual('China');
     })
 
@@ -576,7 +575,6 @@ describe('I18nTest', function () {
     it('i18n_test_4100', 0, function () {
         let value = I18n.getDisplayCountry('zh-Hans', 'en-US', true);
         console.log('i18n_test_4100 ' + value);
-        expect(value).assertNull();
         expect(value).assertEqual('China');
     })