Cacher is the code snippet organizer for pro developers

/**
 * LIST COLUMNS
 * Remove columns from posts and pages lists
 */

function mw_remove_post_columns($columns) {
	unset($columns['author']);
	unset($columns['comments']);
	unset( $columns['wpseo-score'] );
	unset( $columns['wpseo-title'] );
	unset( $columns['wpseo-metadesc'] );
	unset( $columns['wpseo-focuskw'] );

	return $columns;
}
add_filter('manage_edit-post_columns', 'mw_remove_post_columns');


function mw_remove_pages_columns($columns) {
	// unset($columns['cb']);
	// unset($columns['author']);
	unset($columns['comments']);
	unset( $columns['wpseo-title'] );
	unset( $columns['wpseo-metadesc'] );
	unset( $columns['wpseo-focuskw'] );

	return $columns;
}
add_filter('manage_edit-page_columns', 'mw_remove_pages_columns');