How to Hide Spectra Admin Menus

function plt_hide_ultimate_addons_for_gutenberg_menus() {
	//Hide "Spectra".
	remove_menu_page('spectra');
	//Hide "Spectra → Dashboard".
	remove_submenu_page('spectra', 'spectra');
	//Hide "Spectra → Blocks".
	remove_submenu_page('spectra', 'spectra&path=blocks');
	//Hide "Spectra → Popup Builder".
	remove_submenu_page('spectra', 'edit.php?post_type=spectra-popup');
	//Hide "Spectra → AI Features".
	remove_submenu_page('spectra', 'spectra&path=ai-features');
	//Hide "Spectra → Settings".
	remove_submenu_page('spectra', 'spectra&path=settings');
}

add_action('admin_menu', 'plt_hide_ultimate_addons_for_gutenberg_menus', 11);
Where do I put this code?