How to Hide Htaccess File Editor Admin Menus

function plt_hide_htaccess_file_editor_menus() {
	//Hide the "Htaccess" menu.
	remove_menu_page('htaccess-file-editor');
	//Hide the "Htaccess → Htaccess" menu.
	remove_submenu_page('htaccess-file-editor', 'htaccess-file-editor');
	//Hide the "Htaccess → Backup" menu.
	remove_submenu_page('htaccess-file-editor', 'htaccess-file-editor-backup');
}

add_action('admin_menu', 'plt_hide_htaccess_file_editor_menus', 11);

Where do I put this code?