Hide AUS_PARCEL_EXPRESS

functions.php

/**
 * woocommerce_package_rates is a 2.1+ hook
 */
add_filter( 'woocommerce_package_rates', 'hide_express_post', 10, 2 );
 
/**
 * Hide shipping rates when free shipping is available
 *
 * @param array $rates Array of rates found for the package
 * @param array $package The package array/object being shipped
 * @return array of modified rates
 */
function hide_express_post( $rates, $package ) {
  
  // Only modify rates if free_shipping is present
    if ( isset( $rates['AUS_PARCEL_EXPRESS'] ) ) {
   
      unset( $rates['AUS_PARCEL_EXPRESS'] );
    
   }
  
  return $rates;
}