remove custom post type permalink

I’ve registered post type with following —

$holidayLabels = array(
    'name' => __( 'Holidays'),
    'singular_name' => __( 'Holidays'),
    'all_items' => __( 'All Holidays'),
    'add_new' => __( 'Add New Holiday'),
    'add_new_item' => __( 'Add New Holiday'),
    'edit_item' => __( 'Edit Holiday'),
    'new_item' => __( 'New Holiday'),
    'view_item' => __( 'View Holidays'),
    'not_found' => __( 'No Holidays found'),
    'not_found_in_trash' => __( 'No Holidays found in Trash'),
    'parent_item_colon' => ''

);

$holidayArgs = array(
    'labels'               => $holidayLabels,
    'public'               => true,
    'publicly_queryable'   => true,
    '_builtin'             => false,
    'show_ui'              => true,
    'query_var'            => true,
    'rewrite'              => array( "slug" => "holidays" ),
    'capability_type'      => 'post',
    'hierarchical'         => false,
    //'menu_position'        => 6,
    'supports'             => array( 'title'),
    'has_archive'          => false,
    'show_in_nav_menus'    => false,

);
register_post_type('holidays', $holidayArgs);

And I want to remove permalink that appears below title when I post new holiday or start editing existing one.

I want to remove this because, holidays will be displayed in separate widget. I don’t want admin to be able to see it as single post anyhow. There’s no template defined for such.

Well, there is another way. And better, I guess.

You should look at register_post_type parameters. You should probably set them like this:

'public' => false,  // it's not public, it shouldn't have it's own permalink, and so on
'publicly_queryable' => true,  // you should be able to query it
'show_ui' => true,  // you should be able to edit it in wp-admin
'exclude_from_search' => true,  // you should exclude it from search results
'show_in_nav_menus' => false,  // you shouldn't be able to add it to menus
'has_archive' => false,  // it shouldn't have archive page
'rewrite' => false,  // it shouldn't have rewrite rules

If post type is not public, then you won’t see this part of editor.