Remove @nest from Claro's form--checkbox-radio stylesheet

Removed @nest from the form--checkbox-radio.pcss.css stylesheet.

@AkshayAdhav, I think we need to create only one ticket to remove the @nest from the stylesheets rather than creating multiple issues. It will be easy to review and work on that :)

Thanks

Hi @shweta__sharma
Thanks for working on this issue. Just FYI it was tagged for novice meaning saved for new users, that's why I have created multiple issues.
Based on your post history, I think you're good to work on non-novice issues.

It also needs before and after screenshots.

as #6 mentioned. Also was brought up in slack these nest tickets could be consolidated into 1

Consolidating.