How to Hide Social Media Auto Publish Admin Menus

function plt_hide_social_media_auto_publish_menus() {
	//Hide "Social Media Auto Publish".
	remove_menu_page('social-media-auto-publish-settings');
	//Hide "Social Media Auto Publish → Settings".
	remove_submenu_page('social-media-auto-publish-settings', 'social-media-auto-publish-settings');
	//Hide "Social Media Auto Publish → Logs".
	remove_submenu_page('social-media-auto-publish-settings', 'social-media-auto-publish-log');
	//Hide "Social Media Auto Publish → About".
	remove_submenu_page('social-media-auto-publish-settings', 'social-media-auto-publish-about');
	//Hide "Social Media Auto Publish → Suggest a Feature".
	remove_submenu_page('social-media-auto-publish-settings', 'social-media-auto-publish-suggest-features');
}

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

Where do I put this code?