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Tips on Customizing Taxonomy Pages

How to Hide the "Related Pages" Admin Menu

function plt_hide_taxonomy_pages_menus() {
	//Hide the "Pages → Related Pages" menu.
	remove_submenu_page('edit.php?post_type=page', 'edit-tags.php?taxonomy=things&post_type=page');
}

add_action('admin_menu', 'plt_hide_taxonomy_pages_menus', 15);

Where do I put this code?

How to Hide the "Related Pages" Meta Box

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

	//Hide the "Related Pages" meta box.
	remove_meta_box('thingsdiv', $screen->id, 'side');
}

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

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