I just finished building a RESTful API for one of my latest apps. I also built a simple admin interface scaffolding class that will enumerate resources and build simple form
Actually i did a very small amount of research & found this answer on other Stackexchange forum.
I know it's not a good answer to post a link but i don't know the exact answer. So, it's the only way you can solve your doubt.
https://softwareengineering.stackexchange.com/questions/114156/why-there-are-no-put-and-delete-methods-in-html-forms