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/**
 * Remove PayPal Standard from displaying at checkout in WooCommerce
 */
function remove_paypal_from_available_payment_gateways( $gateways ) {

	unset( $gateways['paypal'] );

	return $gateways;
}
add_filter( 'woocommerce_available_payment_gateways', 'remove_paypal_from_available_payment_gateways' );