Good for when you are using it elsewhere on your website and do not want it showing at checkout
<?php
/**
 * Plugin Name: Easy Digital Downloads - Hide social login from checkout
 * Description: Good for when you are using it elsewhere on your website and do not want it showing at checkout
 * Author: Andrew Munro
 * Author URI: https://easydigitaldownloads.com
 * Version: 1.0
 */

function sumobi_edd_remove_social_login_from_checkout() {
	global $edd_slg_render;
	remove_action( 'edd_checkout_form_top', array( $edd_slg_render, 'edd_slg_social_login_buttons' ) );
}
add_action( 'template_redirect', 'sumobi_edd_remove_social_login_from_checkout' );
To implement this snippet on your site, create a brand new, empty WordPress plugin and paste the above code inside.