Removed now-extaneous function

src/node/index.js

@@ -94,32 +94,6 @@ exports.load = function load(filename, format) {
  return loadObject(builder.ns);
 };
 
-/**
- * Get a function that a client can use to update metadata with authentication
- * information from a Google Auth credential object, which comes from the
- * google-auth-library.
- * @param {Object} credential The credential object to use
- * @return {function(Object, callback)} Metadata updater function
- */
-exports.getGoogleAuthDelegate = function getGoogleAuthDelegate(credential) {
- /**
- * Update a metadata object with authentication information.
- * @param {string} authURI The uri to authenticate to
- * @param {Object} metadata Metadata object
- * @param {function(Error, Object)} callback
- */
- return function updateMetadata(authURI, metadata, callback) {
- credential.getRequestMetadata(authURI, function(err, header) {
- if (err) {
- callback(err);
- return;
- }
- metadata.add('authorization', header.Authorization);
- callback(null, metadata);
- });
- };
-};
-
 /**
  * @see module:src/server.Server
  */