/*
Theme Name: Gazek child
Author: 
Description: Your description goes here
Version: 1.0
Template: gazek

This is the child theme for Gazek theme, generated with Generate Child Theme plugin by catchthemes.

(optional values you can add: Theme URI, Author URI, License, License URI, Tags, Text Domain)
*/

function my_manage_columns( $columns ) {
  unset($columns['Thumbnail']);
  return $columns;
}

function my_column_init() {
  add_filter( 'manage_posts_columns' , 'my_manage_columns' );
}
add_action( 'admin_init' , 'my_column_init' );