удалить раздел Tag's

/**
 * Hide “All Products > Tags” Link from Admin Menu
 */
add_action( 'admin_menu', 'ml_hide_product_tags_admin_menu', 9999 );

function ml_hide_product_tags_admin_menu() {
	remove_submenu_page( 'edit.php?post_type=product', 'edit-tags.php?taxonomy=product_tag&post_type=product' );
}

/**
 * Remove Product tags Metabox
 */
add_action( 'admin_menu', 'ml_hide_product_tags_metabox' );

function ml_hide_product_tags_metabox() {
	remove_meta_box( 'tagsdiv-product_tag', 'product', 'side' );
}

/**
 * Remove Tags Column from All Products page
 */
add_filter('manage_product_posts_columns', 'ml_hide_product_tags_column', 999 );

function ml_hide_product_tags_column( $product_columns ) {
	unset( $product_columns['product_tag'] );
	return $product_columns;
}
 
/**
 * Remove Product Tags Textarea from Quick Edit and Bulk Edit
 */ 
add_filter( 'quick_edit_show_taxonomy', 'ml_hide_product_tags_quick_edit', 10, 2 );

function ml_hide_product_tags_quick_edit( $show, $taxonomy_name ) {

    if ( 'product_tag' == $taxonomy_name )
        $show = false;

    return $show;
		
}
 
/**
 * Remove Product Tag Cloud Widget
 */ 
add_action( 'widgets_init', 'ml_remove_product_tag_cloud_widget' );

function ml_remove_product_tag_cloud_widget(){
	unregister_widget('WC_Widget_Product_Tag_Cloud');
}