Stop checking for reactid as createElement doesnt make one

React.DOM used reactid but createElement does not
https://reactjs.org/blog/2016/03/07/react-v15-rc1.html#documentcreateelement-is-in-and-data-reactid-is-out

Author: BookOfGreg

test/dummy_sprockets/app/assets/javascripts/pages.js

@@ -13,9 +13,9 @@ var GreetingMessage = createReactClass({
     this.setState({greeting: 'Goodbye'});
   },
   render: function() {
-    return React.DOM.div({},
-      React.DOM.div({}, this.state.greeting, ' ', this.props.name),
-      React.DOM.button({onClick: this.goodbye}, 'Goodbye')
+    return React.createElement('div', {},
+      React.createElement('div', {}, this.state.greeting, ' ', this.props.name ),
+      React.createElement('button', {onClick: this.goodbye}, 'Goodbye')
     );
   }
 });

test/react/jsx_test.rb

@@ -9,7 +9,7 @@
 (function() {
   var Component;
 
-  Component = createReactClass({displayName: "Component",
+  Component = createReactClass({
     render: function() {
       return React.createElement(ExampleComponent, {videos:this.props.videos} );
     }

test/react/rails/component_mount_test.rb

@@ -73,13 +73,11 @@ class ComponentMountTest < ActionDispatch::IntegrationTest
       html = @helper.react_component('Todo', { todo: 'render on the server' }.to_json, prerender: true)
       assert(html.include?('data-react-class="Todo"'), 'it includes attrs for UJS')
       assert(html.include?('>render on the server</li>'), 'it includes rendered HTML')
-      assert(html.include?('data-reactid'), 'it includes React properties')
     end
 
     test '#react_component passes :static to BundleRenderer' do
       html = @helper.react_component('Todo', { todo: 'render on the server' }.to_json, prerender: :static)
       assert(html.include?('>render on the server</li>'), 'it includes rendered HTML')
-      assert(!html.include?('data-reactid'), 'it DOESNT INCLUDE React properties')
     end
 
     test '#react_component does not include HTML properties with a static render' do