Don't override LoDash includes() function.

LoDash includes() does same job (with more types supported) of custom function.

lib/utils.js

@@ -15,11 +15,6 @@ var Utils = module.exports = {
     var _ = lodash;
 
     _.mixin({
-      includes: function(str, needle){
-        if (needle === '') return true;
-        if (str === null) return false;
-        return String(str).indexOf(needle) !== -1;
-      },
       camelizeIf: function(string, condition) {
         var result = string;