//Remove Billing Fields

unset($fields['billing']['billing_first_name']);  //Billing First Name

unset($fields['billing']['billing_last_name']);   //Billing Last Name

unset($fields['billing']['billing_company']);     //Billing Company

unset($fields['billing']['billing_address_1']);   // Billing Address 1

unset($fields['billing']['billing_address_2']);   // Billing Address 2

unset($fields['billing']['billing_city']);        // Billing City

unset($fields['billing']['billing_postcode']);    // Billing Postcode

unset($fields['billing']['billing_country']);     // Billing Country

unset($fields['billing']['billing_state']);       //Billing State

unset($fields['billing']['billing_phone']);       // Billing Phone

unset($fields['billing']['billing_email']);       //Billing Email