remove autoNumber specification for MathJax

lib/views/layout/layout.html

@@ -42,7 +42,6 @@
     <script type="text/x-mathjax-config" async>
       MathJax.Hub.Config({
         skipStartupTypeset: true,
-        TeX: { equationNumbers: { autoNumber: "AMS" }},
         extensions: ["tex2jax.js"],
         jax: ["input/TeX", "output/SVG"],
         tex2jax: {