Remove error introducing code

packages/design/src/select/demo/custom-tag-render.tsx

@@ -1,5 +1,5 @@
 import { Select, Tag } from '@oceanbase/design';
-import React, { useState } from 'react';
+import React from 'react';
 
 const options = ['gold', 'green', 'red', 'cyan'];
 
@@ -16,28 +16,16 @@ const tagRender = props => {
   );
 };
 
-const App: React.FC = () => {
-  const [theme, setTheme] = useState();
-  return (
-    <>
-      <Select
-        mode="multiple"
-        tagRender={tagRender}
-        defaultValue={['gold', 'cyan']}
-        style={{ width: '100%' }}
-        options={options.map(item => ({ label: item, value: item }))}
-      />
-      <Select mode="tags" style={{ width: '100%' }} defaultValue={['test']} />
-      <Select<'light' | 'dark'>
-        // defaultValue={DEFAULT_THEME}
-        style={{ width: 120 }}
-        onChange={value => setTheme(value)}
-      >
-        <Select.Option value="light">白色主题</Select.Option>
-        <Select.Option value="dark">黑色主题</Select.Option>
-      </Select>
-    </>
-  );
-};
+const App: React.FC = () => (
+  <>
+    <Select
+      mode="multiple"
+      tagRender={tagRender}
+      defaultValue={['gold', 'cyan']}
+      style={{ width: '100%' }}
+      options={options.map(item => ({ label: item, value: item }))}
+    />
+  </>
+);
 
 export default App;