Chechout page edit

Please open the functions.php file ( at the wp-content\themes\techone) and then enter these php codes as the attachment screenshot
add_filter( 'woocommerce_checkout_fields' , 'custom_override_checkout_fields' );
function custom_override_checkout_fields( $fields ) {
unset($fields['billing']['billing_company']);
return $fields;
}
add_filter( 'woocommerce_checkout_fields' , 'bbloomer_remove_billing_postcode_checkout' );
function bbloomer_remove_billing_postcode_checkout( $fields ) {
unset($fields['billing']['billing_postcode']);
return $fields;
}