It is not possible to have a web application with out WEB-INF folder.
The web server looks into the web.xml file each time a request is made. web.xml file is the mother of your application. With out the mother the application is not ready. And web.xml file must be placed in WEB-INf folder. Even though if you have a web.xml file without a WEB-INF folder your project is not ready. so WEB-INF folder is necessary.