Remove the github paragraph on header

Remove the github paragraph on header, since it already has a link to github using aria to accessibility

Author: ricardoseriani

DOCUMENTATION/themes/hugo-material-docs/layouts/partials/header.html

@@ -21,7 +21,6 @@
     <div class="button button-github" role="button" aria-label="GitHub">
         <a style="padding: 0px; font-size:40px" href="https://github.com/{{ . }}" title="@{{ . }} on GitHub" target="_blank" class="toggle-button icon icon-github"></a>
     </div>
-      <p style="font-size: 18px; padding: 8px">Github</p>
     {{ end }}
 
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