Code style cleanup, remove redundant comments

lib/proto/attach-link.js

@@ -9,10 +9,10 @@ var attrKey = "data-pjax-keyup-state"
 var linkAction = function(el, event) {
   // Since loadUrl modifies options and we may add our own modifications below,
   // clone it so the changes don't persist
-  var options = clone(this.options);
+  var options = clone(this.options)
 
   // Initialize requestOptions since loadUrl expects it to be an object
-  options.requestOptions = {};
+  options.requestOptions = {}
 
   // Don’t break browser special behavior on links (like page in new window)
   if (event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) {
@@ -66,7 +66,7 @@ var linkAction = function(el, event) {
 }
 
 var isDefaultPrevented = function(event) {
-  return event.defaultPrevented || event.returnValue === false;
+  return event.defaultPrevented || event.returnValue === false
 }
 
 module.exports = function(el) {