Tips on Customizing Issues and Series for Newspapers, Magazines, Publishers, Writers

How to Hide PublishPress Series Free Admin Menus

function plt_hide_organize_series_menus() {
	//Hide "Posts → Series".
	remove_submenu_page('edit.php', 'edit-tags.php?taxonomy=series');
	//Hide "Posts → Series Categories".
	remove_submenu_page('edit.php', 'edit-tags.php?taxonomy=series_group');
	//Hide "Posts → Manage Series".
	remove_submenu_page('edit.php', 'manage-issues');

	//Hide "Series".
	remove_menu_page('orgseries_options_page');
	//Hide "Series → Settings".
	remove_submenu_page('orgseries_options_page', 'orgseries_options_page');
	//Hide "Series → Post List Boxes".
	remove_submenu_page('orgseries_options_page', 'edit.php?post_type=pps_post_list_box');
	//Hide "Series → Post Details".
	remove_submenu_page('orgseries_options_page', 'edit.php?post_type=pps_post_details');
	//Hide "Series → Post Navigation".
	remove_submenu_page('orgseries_options_page', 'edit.php?post_type=pps_post_navigation');
	//Hide "Series → Upgrade to Pro".
	remove_submenu_page('orgseries_options_page', 'orgseries_options_page-menu-upgrade-link');
}

add_action('admin_menu', 'plt_hide_organize_series_menus', 21);

Where do I put this code?

How to Hide PublishPress Series Free Meta Boxes

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

	//Hide the "Series" meta box.
	remove_meta_box('tagsdiv-series', $screen->id, 'side');
	//Hide the "Series Post Details Preview" meta box.
	remove_meta_box('pps_series_meta_box_preview', $screen->id, 'normal');
	//Hide the "Series Post Details Editor" meta box.
	remove_meta_box('pps_series_meta_box_editor', $screen->id, 'normal');
	//Hide the "Shortcode" meta box.
	remove_meta_box('pps_series_meta_box_shortcode', $screen->id, 'side');
	//Hide the "Series Post Navigation Preview" meta box.
	remove_meta_box('pps_series_post_navigation_preview', $screen->id, 'normal');
	//Hide the "Series Post Navigation Editor" meta box.
	remove_meta_box('pps_series_post_navigation_editor', $screen->id, 'normal');
	//Hide the "Shortcode" meta box.
	remove_meta_box('pps_series_post_navigation_shortcode', $screen->id, 'side');
	//Hide the "Post List Box Preview" meta box.
	remove_meta_box('pps_post_list_box_preview_area', $screen->id, 'normal');
	//Hide the "Post List Box Editor" meta box.
	remove_meta_box('pps_post_list_box_editor_area', $screen->id, 'normal');
	//Hide the "Shortcode" meta box.
	remove_meta_box('pps_post_list_box_shortcode', $screen->id, 'side');
}

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