Hello Gela,
Thank you so much for using our theme SuperNews. If you want to change the text on the footer, you have to use the premium plan of it. In case of free theme, there is no options to remove or change it. If you are familiar with WordPress codes, you can customize the theme.
https://demo.acmethemes.com/supernewspro/home-2/
Note: Child theme is recommended to customize the theme.
Warm Regards,
Acme Supports