remove demo just for bug tracing

components/datepicker/demo/dialog.md

@@ -1,45 +0,0 @@
-# 结合弹出层
-
-- order: 10
-
-弹出层内的时间选择
-
----
-
-````jsx
-import { Modal, Button, Datepicker } from 'antd';
-
-const App = React.createClass({
-  getInitialState() {
-    return { visible: false };
-  },
-  showModal() {
-    this.setState({
-      visible: true
-    });
-  },
-  handleOk() {
-    console.log('点击了确定');
-    this.setState({
-      visible: false
-    });
-  },
-  handleCancel() {
-    this.setState({
-      visible: false
-    });
-  },
-  render() {
-    return <div>
-      <Button type="primary" onClick={this.showModal}>显示对话框</Button>
-      <Modal title="第一个 Modal" visible={this.state.visible}
-      onOk={this.handleOk} onCancel={this.handleCancel}>
-        <Datepicker defaultValue="2015-12-12" popupStyle={{zIndex:2000}}/>
-      </Modal>
-    </div>;
-  }
-});
-
-ReactDOM.render(<App /> , document.getElementById('components-datepicker-demo-dialog'));
-````
-