Remove Unused Payment Gateways from Dashboard

gistfile1.php

<?php

add_filter( 'woocommerce_payment_gateways', 'growdev_remove_unused_payment_gateways', 20, 1 );
/**
 *  This function will remove all of the WooCommerce standard gateways from the 
 *  WooCommerce > Settings > Checkout dashboard.
 *  @see current default gateways https://github.com/woocommerce/woocommerce/blob/master/includes/class-wc-payment-gateways.php#L77-L85
 */
function growdev_remove_unused_payment_gateways( $load_gateways ) {

	$remove_gateways = array( 
		'WC_Gateway_BACS',
        	'WC_Gateway_Cheque',
        	'WC_Gateway_COD',
		'WC_Gateway_Paypal'
	);

	foreach ( $load_gateways as $key => $value ) {

		if ( in_array( $value, $remove_gateways ) ) {
			unset( $load_gateways[ $key ] );
		}
	}

	return $load_gateways;
}

Just change that loop for:
$load_gateways = array_diff( $load_gateways, $remove_gateways );

Any chance of getting this updated for 2019's default gateways?

@coosamatt Updated.