remove back theme switching check

Author: GoodDayForSurf

packages/devextreme-cli/testing/app-template.test.shared.js

@@ -181,8 +181,6 @@ module.exports = (env) => {
                                     compareSnapshot(image, 'profile');
 
                                     await compareThemeModeSnapshot('profile', 'dark');
-
-                                    await compareThemeModeSnapshot('profile', 'light');
                                 });
 
                                 it('Tasks view', async() => {