Remove login form (and registration) on WooCommerce checkout page

Solution:

To remove login form from Woocommerce checkout use:

// Remove login form from checkout
add_action( 'woocommerce_before_checkout_form', 'remove_checkout_login_form', 4 );
function remove_checkout_login_form(){
    remove_action( 'woocommerce_before_checkout_form', 'woocommerce_checkout_login_form', 10 );
}

To remove Registration from Woocommerce checkout simply use:

add_filter( 'woocommerce_checkout_registration_enabled', '__return_false' );

Both snippets goes in function.php file of your active child theme (or active theme). Tested and works.