Remove temp files

Author: manshreck

_includes/side-nav-fast.html

@@ -2,9 +2,6 @@
    <li><h5 class="doc-side-nav-title">
     <a href="{{ site.baseurl }}/fast/">Performance Guide</a></h5>
    </li>
-   <li><h6 class="doc-side-nav-title">
-       <a href="hints.html">Performance Hints</a></h6>
-   </li>
    <li><h6 class="doc-side-nav-title">Fast Tips</h6></li>
    {% assign sorted_posts = site.posts | sort: 'order' %}