Remove form disabled demo

components/form/demo/disabled.md

@@ -1,50 +0,0 @@
-# 禁用状态
-
-- order: 7
-
-1) 单独为输入控件设置 `disabled` 属性；
-
-2) 为 `<fieldset>` 设置 `disabled` 属性，可以禁用 `<fieldset>` 中包含的所有控件。
-
----
-
-````jsx
-import { Row, Col, Button, Input, Form } from 'antd';
-const FormItem = Form.Item;
-
-ReactDOM.render(
-  <Form horizontal>
-    <FormItem
-      label="单独禁用输入框："
-      labelCol={{ span: 5 }}
-      wrapperCol={{ span: 12 }}>
-      <Input defaultValue="我是禁用的" disabled />
-    </FormItem>
-
-    <fieldset disabled>
-      <legend>禁用的 fieldset</legend>
-      <FormItem
-        id="userName"
-        label="用户名："
-        labelCol={{ span: 5 }}
-        wrapperCol={{ span: 12 }}
-        required>
-        <p className="ant-form-text">大眼萌 minion</p>
-      </FormItem>
-      <FormItem
-        id="password"
-        label="密码："
-        labelCol={{ span: 5 }}
-        wrapperCol={{ span: 12 }}
-        required>
-        <Input type="password" defaultValue="123456" id="password" />
-      </FormItem>
-      <Row>
-        <Col span="12" offset="5">
-          <Button htmlType="submit" type="primary">确定</Button>
-        </Col>
-      </Row>
-    </fieldset>
-  </Form>
-, mountNode);
-````