diff --git a/lib/helpers/buildUrl.js b/lib/helpers/buildUrl.js
deleted file mode 100644
index ed95c03dadc9369ed93b1e83c5591e9520bd27c3..0000000000000000000000000000000000000000
--- a/lib/helpers/buildUrl.js
+++ /dev/null
@@ -1,67 +0,0 @@
-'use strict';
-
-var utils = require('./../utils');
-
-function encode(val) {
-  return encodeURIComponent(val).
-    replace(/%40/gi, '@').
-    replace(/%3A/gi, ':').
-    replace(/%24/g, '$').
-    replace(/%2C/gi, ',').
-    replace(/%20/g, '+').
-    replace(/%5B/gi, '[').
-    replace(/%5D/gi, ']');
-}
-
-/**
- * Build a URL by appending params to the end
- *
- * @param {string} url The base of the url (e.g., http://www.google.com)
- * @param {object} [params] The params to be appended
- * @returns {string} The formatted url
- */
-module.exports = function buildURL(url, params, paramsSerializer) {
-  if (!params) {
-    return url;
-  }
-
-  var serializedParams;
-  if (paramsSerializer) {
-    serializedParams = paramsSerializer(params);
-  }
-  else {
-    var parts = [];
-
-    utils.forEach(params, function (val, key) {
-      if (val === null || typeof val === 'undefined') {
-        return;
-      }
-
-      if (utils.isArray(val)) {
-        key = key + '[]';
-      }
-
-      if (!utils.isArray(val)) {
-        val = [val];
-      }
-
-      utils.forEach(val, function (v) {
-        if (utils.isDate(v)) {
-          v = v.toISOString();
-        }
-        else if (utils.isObject(v)) {
-          v = JSON.stringify(v);
-        }
-        parts.push(encode(key) + '=' + encode(v));
-      });
-    });
-
-    serializedParams = parts.join('&');
-  }
-
-  if (serializedParams) {
-    url += (url.indexOf('?') === -1 ? '?' : '&') + serializedParams;
-  }
-
-  return url;
-};