Remove posts

<?php

/**
 * Remove default 'posts' post type from wp-admin
 */
add_action('admin_menu', function () {
    remove_menu_page('edit.php');
});

add_action('wp_before_admin_bar_render', function () {
    global $wp_admin_bar;
    $wp_admin_bar->remove_node('new-post');
});

add_action('wp_dashboard_setup', function () {
    remove_meta_box('dashboard_quick_press', 'dashboard', 'side');
}, 999);