Remove the brokens links to language-specific readmes

which are no longer maintained by sinatra/sinatra#1807 and removed by #295.

Author: cafedomancer

intro.html

@@ -3,18 +3,6 @@
 layout: default
 ---
 
-<p><small>This page is also available in
-  <a href="/intro-zh.html">Chinese</a>,
-  <a href="/intro-fr.html">French</a>,
-  <a href="/intro-de.html">German</a>,
-  <a href="/intro-hu.html">Hungarian</a>,
-  <a href="/intro-ko.html">Korean</a>,
-  <a href="/intro-pt-br.html">Portuguese (Brazilian)</a>,
-  <a href="/intro-pt-pt.html">Portuguese (European)</a>,
-  <a href="/intro-ru.html">Russian</a>,
-  <a href="/intro-es.html">Spanish</a> and
-  <a href="/intro-ja.html">Japanese</a>.</small></p>
-
 <h1>Getting Started</h1>
 
 {% include README.html %}