Need to Remove a Link From Plugin Footer

I am using a plugin having only 1 php file, 1 CSS & 2 .js file.

It is GPL licensed plugin but showing a link at bottom…i want to remove that link..you can see the link here http://www.emortgagecalculator.org and link is “powered by repaid.org

Here is a PHP code from plugin..please advice to edit..if i edit the footer code ..widget will disappear

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[duplicate post: https://wordpress.org/support/topic/need-to-remove-a-link-from-plugin-footer ]