If that link was created with an account on that site, then usually yes you can by right click on project->show urls->verified->select URL->right click->Turn Project Active and Remove selected Links
can i use gsa to delete a link which already built after 30 days from building it ?
I believe GSA (Search Engine Ranker) is primarily used for building links, but it doesn't have the capability to delete links once they are built. To remove a link, you'd need to manually contact the website owner or use Google's disavow tool if it's affecting your SEO negatively.
Did you look at @sven's response before you wrote yours?
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Did you look at @sven's response before you wrote yours?