delete doublon list

src/pages-doc/doc/core/index.tsx

@@ -32,8 +32,6 @@ function index(): ReactElement {
         <Link to="/doc/core/socialmedialist">List Social Media</Link>
         <br></br>
         <Link to="/doc/core/image">Image</Link>
-        <br></br>
-        <Link to="/doc/core/socialmedialist">List Social Media</Link>
       </div>
     </Content>
   );