[WooCommerce] Make the State field not required

wc-no-state-field-required.php

add_filter( 'woocommerce_billing_fields', 'woo_filter_state_billing', 10, 1 );
add_filter( 'woocommerce_shipping_fields', 'woo_filter_state_shipping', 10, 1 );
function woo_filter_state_billing( $address_fields ) { 
  $address_fields['billing_state']['required'] = false;
	return $address_fields;
}
function woo_filter_state_shipping( $address_fields ) { 
	$address_fields['shipping_state']['required'] = false;
	return $address_fields;
}