remove v5 from file name

packages/app/test/integration/service/v5.user-groups.test.ts → packages/app/test/integration/service/user-groups.test.ts

@@ -14,7 +14,6 @@ describe('UserGroupService', () => {
 
   beforeAll(async() => {
     crowi = await getInstance();
-    await crowi.configManager.updateConfigsInTheSameNamespace('crowi', { 'app:isV5Compatible': true });
 
     UserGroup = mongoose.model('UserGroup');