Hello @cosicat,

To remove the Html content at first create the child theme.

You can manually activate the child theme or simply create the child theme using the plugin given below:

https://wordpress.org/plugins/wp-child-theme-generator/

After activating the child theme, in your child theme’s functions.php add below given code.

function education_hub_footer_goto_top() {

		$go_to_top = education_hub_get_option( 'go_to_top' );
		if ( true !== $go_to_top ) {
			return;
		}
		//echo '<a href="#page" class="scrollup" id="btn-scrollup"><i class="fa fa-chevron-up"></i></a>';

	}

Hope this helps.

Best Regards!!