remove postfixOps example

Author: toy

_cheatsheets/index.md

@@ -68,10 +68,6 @@ languages: [ba, fr, ja, pl, pt-br, zh-cn, th, ru]
       <td><pre class="highlight"><code>(1 to 5).map(x =&gt; x * x)</code></pre></td>
       <td>Anonymous function: to use an arg twice, have to name it.</td>
     </tr>
-    <tr>
-      <td><span class="label success">Good</span><br> <pre class="highlight"><code>(1 to 5).map(2 *)</code></pre><br /> <span class="label important">Bad</span><br> <pre class="highlight"><code>(1 to 5).map(* 2)</code></pre></td>
-      <td>Anonymous function: bound infix method.<br /> Use <code class="highlighter-rouge">2 * _</code> for sanity’s sake instead.<br />Will require <code>import scala.language.postfixOps</code> in the future.</td>
-    </tr>
     <tr>
       <td><pre class="highlight"><code>(1 to 5).map { x =&gt;
   val y = x * 2