Tips on Customizing PublishPress Permissions: Control User Access for Posts, Pages, Categories, Tags

How to Hide PublishPress Permissions Admin Menus

function plt_hide_press_permit_core_menus() {
	//Hide "Permissions".
	remove_menu_page('presspermit-groups');
	//Hide "Permissions → Permissions".
	remove_submenu_page('presspermit-groups', 'presspermit-groups');
	//Hide "Permissions → Teaser".
	remove_submenu_page('presspermit-groups', 'presspermit-posts-teaser');
	//Hide "Permissions → Settings".
	remove_submenu_page('presspermit-groups', 'presspermit-settings');
	//Hide "Permissions → Upgrade to Pro".
	remove_submenu_page('presspermit-groups', 'permissions-pro');
}

add_action('admin_menu', 'plt_hide_press_permit_core_menus', 1000);

Where do I put this code?

How to Hide PublishPress Permissions Meta Boxes

function plt_hide_press_permit_core_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Permissions: Post" meta box.
	remove_meta_box('pp_all_post_exceptions', $screen->id, 'advanced');
	//Hide the "Permissions: Page" meta box.
	remove_meta_box('pp_all_page_exceptions', $screen->id, 'advanced');
}

add_action('add_meta_boxes', 'plt_hide_press_permit_core_metaboxes', 20);