Welcome to the forum @Giriiii!
Once you remove the domain from your account, web browsers that are still using the old DNS settings will try to show your website for, here. Since you no longer have a website here, the suspended page is shown. To fix this issue for yourself, you just need to wait 72 hours for DNS propagation.
If you want to fix it for yourself, so you can begin testing your site, just clear you cache.
To learn more, read the guide that @KangJL posted.
Please let me know if you have any questions!