How to Hide WP Admin UI Customize Admin Menus

function plt_hide_wp_admin_ui_customize_menus() {
	//Hide "WP Admin UI Customize".
	remove_menu_page('wp_admin_ui_customize');
	//Hide "WP Admin UI Customize → WP Admin UI Customize".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize');
	//Hide "WP Admin UI Customize → Frontend".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_setting_site');
	//Hide "WP Admin UI Customize → General".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_admin_general_setting');
	//Hide "WP Admin UI Customize → Dashboard".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_dashboard');
	//Hide "WP Admin UI Customize → Admin bar".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_admin_bar');
	//Hide "WP Admin UI Customize → Sidebar".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_sidemenu');
	//Hide "WP Admin UI Customize → Meta boxes".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_manage_metabox');
	//Hide "WP Admin UI Customize → Posts and Pages".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_post_add_edit_screen');
	//Hide "WP Admin UI Customize → Appearance Menus".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_appearance_menus');
	//Hide "WP Admin UI Customize → Login Form".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_loginscreen');
	//Hide "WP Admin UI Customize → Change of Plugin Capabilities".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_plugin_cap');
	//Hide "WP Admin UI Customize → Reset Settings".
	remove_submenu_page('wp_admin_ui_customize', 'wp_admin_ui_customize_reset_userrole');
}

add_action('admin_menu', 'plt_hide_wp_admin_ui_customize_menus', 10001);

Where do I put this code?