How to Hide Developer Debug Tools Admin Menus

function plt_hide_dev_debug_tools_menus() {
	//Hide "Developer Debug Tools".
	remove_menu_page('dev-debug-dashboard');
	//Hide "Developer Debug Tools → Dashboard".
	remove_submenu_page('dev-debug-dashboard', 'dev-debug-dashboard');
	//Hide "Developer Debug Tools → Tools".
	remove_submenu_page('dev-debug-dashboard', 'dev-debug-tools');
	//Hide "Developer Debug Tools → Resources".
	remove_submenu_page('dev-debug-dashboard', 'dev-debug-resources');
	//Hide "Developer Debug Tools → Settings".
	remove_submenu_page('dev-debug-dashboard', 'dev-debug-settings');
	//Hide "Developer Debug Tools → Changelog".
	remove_submenu_page('dev-debug-dashboard', 'dev-debug-changelog');
}

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

Where do I put this code?