refactor: erefactor/AutoRefactor - Annotation (#8544)

AutoRefactor cleanup 'AnnotationCleanUp' applied by erefactor:

Simplifies annotation uses:
- empty parentheses will be removed from annotations,
- single members named "value" will be removed from annotations and
only the value will be left.

For AutoRefactor see https://github.com/JnRouvignac/AutoRefactor
For erefactor see https://github.com/cal101/erefactor

modules/openapi-generator-online/src/main/java/org/openapitools/codegen/online/configuration/HomeController.java

@@ -25,7 +25,7 @@ import org.springframework.web.bind.annotation.RequestMapping;
  */
 @Controller
 public class HomeController {
-    @RequestMapping(value = "/")
+    @RequestMapping("/")
     public String index() {
         return "redirect:index.html";
     }