How to Hide Colorful Notes TinyGlow Annotator Admin Menus

function plt_hide_colorful_notes_tinyglow_annotator_menus() {
	//Hide "Colorful Notes".
	remove_menu_page('colorful-notes');
	//Hide "Colorful Notes → Dashboard".
	remove_submenu_page('colorful-notes', 'colorful-notes');
	//Hide "Colorful Notes → Notes".
	remove_submenu_page('colorful-notes', 'colorful-notes-notes');
	//Hide "Colorful Notes → Settings".
	remove_submenu_page('colorful-notes', 'colorful-notes-settings');
}

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

Where do I put this code?