How to hide "Designed by Themes & Co"

Hello everyone
I am a novice web designer and would like to understand how to remove the text at the bottom “Designed by Themes & Co”. (I’m using Customizr 3.2.5). Repeat that I am a beginner and also Italian and then to explain as clear as possible. I tried, and failed, different methods.
This is the file footer.php:

<?php
/**
* The template for displaying the footer.
*
*
* @package Customizr
* @since Customizr 3.0
*/
do_action( ‘__before_footer’ ); ?>
<!– FOOTER –>
<footer id=”footer” class=”<?php echo tc__f(‘tc_footer_classes’, ”) ?>”>
<?php do_action( ‘__footer’ ); // hook of footer widget and colophon?>
</footer>
<?php
wp_footer(); //do not remove, used by the theme and many plugins
do_action( ‘__after_footer’ ); ?>
</body>
<?php do_action( ‘__after_body’ ); ?>
</html>

Thanks to all