functions.php

<?php
// Remove SEO menu from Admin bar
add_action( 'wp_before_admin_bar_render', 'mytheme_admin_bar_render' );
function mytheme_admin_bar_render() {
	global $wp_admin_bar;
	$wp_admin_bar->remove_menu('wpseo-menu');
}
// Remove ‘page analysis’ and annoying SEO columns
add_filter( 'wpseo_use_page_analysis', '__return_false' );