How to Hide Front User Submit | Front Editor Admin Menus

function plt_hide_front_editor_menus() {
	//Hide "Front User Submit".
	remove_menu_page('front_editor_settings');
	//Hide "Front User Submit → Post Forms".
	remove_submenu_page('front_editor_settings', 'fe-post-forms');
	//Hide "Front User Submit → Settings".
	remove_submenu_page('front_editor_settings', 'fe-global-settings');
	//Hide "Front User Submit → Affiliation".
	remove_submenu_page('front_editor_settings', 'front_editor_settings-affiliation');
	//Hide "Front User Submit → Contact Us".
	remove_submenu_page('front_editor_settings', 'front_editor_settings-contact');
	//Hide "Front User Submit → Support Forum".
	remove_submenu_page('front_editor_settings', 'front_editor_settings-wp-support-forum');
	//Hide "Front User Submit → Upgrade".
	remove_submenu_page('front_editor_settings', 'front_editor_settings-pricing');
}

add_action('admin_menu', 'plt_hide_front_editor_menus', 1000000000);

Where do I put this code?