How to take out Theme’s footer text

Hello, I am taking part in all over with a theme named “Upcoming Travel” variation 1..3, most matters are the way I like to be but I am possessing difficulty to edit out the Copyright phrases from the concept, I went to footer.php and I see this:

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so, I am pondering the purpose I need to find and edit is “do_action( ‘next_vacation_footer’ )”

problem: the place or how to discover this purpose? and is that the correct approach for my purpose?

Thanks.