!8782 delete I18n.getAppPreferredLanguage to 4.0beta1

Merge pull request !8782 from 杨清/cherry-pick-1685154943

global/i18n_standard/intljs/src/main/js/test/Lang.test.js

@@ -199,18 +199,6 @@ describe('LangTest', function () {
         }
     })
 
-    /* *
-    * @tc.number SUB_GLOBAL_I18N_JS_PREFERREDLANGUAGE_1100
-    * @tc.name test the getAppPreferredLanguage interface
-    * @tc.desc check the value of getAppPreferredLanguage method
-    */
-    it('i18n_test_preferredlanguage_1100', 0, function () {
-        console.log('i18n_test_preferredlanguage_1100 ' + 'start');
-        let value = I18n.getAppPreferredLanguage();
-        console.log('i18n_test_preferredlanguage_1100 ' + value);
-        expect(value).assertContain('zh');
-    })
-
     /* *
     * @tc.number  SUB_GLOBAL_INTL_JS_TRANSFER_0100
     * @tc.name    transfer from lower to upper