Hello @arunchahar
Kindly generate the SITE KEY & SECRET KEY from the google recaptcha might be the issue is coming due to some domain issue follow the step by step tutorial of the blog.
https://bagisto.com/en/how-to-use-google-recaptcha-in-bagisto/
Also, it will be great if you provide us with your admin credentials so we can check it out at our end.
Also confirm the same that still you want to hide this option if yes then it the below file is responsible for the Configurations
packages >> Webkul >> Admin >> src >> Config >> system.php
system.php.png
Thanks & Regards