1. We need a child theme for Listivo: 

How to use Child Theme? How to change files (php / css / js) and keep theme future update compatibility?


 2. Add this PHP code to the functions.php file: 


remove_filter( 'the_content', 'wpautop' );remove_filter( 'the_excerpt', 'wpautop' );function aiooc_crunchify_wpautop_nobr( $content ) {return wpautop( $content, false );}add_filter( ‘the_content’, ‘aiooc_crunchify_wpautop_nobr’ );add_filter( ‘the_excerpt’, ‘aiooc_crunchify_wpautop_nobr’ );
PHP


3. Results:

This code removed p tag when you hit enter.