update for cheatsheet page

Author: lixun910

download.html

@@ -109,7 +109,6 @@
       <h1 class="project-name">GeoDa</h1>
       <h2 class="project-tagline">Download GeoDa Software</h2>
       <a href="//geodacenter.github.io/" class="btn">Homepage</a>
-      <a href="//geodacenter.github.io/download.html" class="btn">Download</a>
       <a href="https://github.com/GeoDaCenter/geoda/" class="btn">View on GitHub</a>
       <a href="https://geodacenter.github.io/data-and-lab/"  target="_blank" class="btn">Data</a>
       <a href="//geodacenter.github.io/cheatsheet.html" class="btn">Cheat Sheet</a>

support.html

@@ -38,7 +38,6 @@ <h2 class="project-tagline">Support</h2>
       <a href="https://geodacenter.github.io/data-and-lab/"  target="_blank" class="btn">Data</a>
       <a href="//geodacenter.github.io/cheatsheet.html" class="btn">Cheat Sheet</a>
        <a href="documentation.html" class="btn">Documentation</a>
-       <a href="//geodacenter.github.io/support.html" class="btn">Support</a>
       <a href="//geodacenter.github.io/index-cn.html" class="btn">中文</a>
     </section>