chore(syntax): remove unused parameter in each

Author: juliemr

Diff for: lib/element.js

@@ -484,7 +484,7 @@ ElementArrayFinder.prototype.then = function(fn, errorFn) {
  *
  * @param {function(ElementFinder)} fn Input function
  */
-ElementArrayFinder.prototype.each = function(fn, index) {
+ElementArrayFinder.prototype.each = function(fn) {
   return this.map(fn).then(function() {
     return null;
   });