Remove or modify Copyright From WordPress Free Theme's Child Theme Footer

Remove or modify Copyright or credit links from WordPress Theme's Child Theme Footer? The title seems a little confusing, but what I mean is if you want to remove or modify the copyright link in the footer of a child theme whose parent theme is a WordPress Theme wherein the creators allow editing or removing the credit links. Phew! Well, I specifically mentioned "allow to remove the credits" because, "free theme" doesn't mean we can always freely remove credits from themes wherever we want. And since it is the work of others, it is recommended to credit the creators though I know many people remove the credits just like that. 

Anyway, in this post we shall discuss how to remove or modify the copyright credit link from the footer of a child theme of a WordPress theme, which allows removing the credit links.