Remove the FAQ.

It was mostly obsolete, does not actually answer *frequently*
asked questions, and was way too short to cover real questions.

Author: sjrd

_data/doc.yml

@@ -66,5 +66,3 @@
       url: /doc/internals/downloads.html
     - text: Version history
       url: /doc/internals/version-history.html
-- text: FAQ
-  url: /doc/faq.html

_includes/footer.html

@@ -7,7 +7,6 @@ <h4>LEARN</h4>
                 <div class="hline-w"></div>
                 <a class="grey-text text-lighten-3" href="{{ site.baseurl }}/doc/">Documentation</a><br/>
                 <a class="grey-text text-lighten-3" href="{{ site.baseurl }}/tutorial/">Tutorial</a><br/>
-                <a class="grey-text text-lighten-3" href="{{ site.baseurl }}/doc/faq.html">FAQ</a>
             </div>
             <div class="col-md-4">
                 <h4>COMMUNITY</h4>