UX: Removed a redundant git pull statement from the user message (#260)

Author: tvavrda

admin/assets/javascripts/discourse/templates/update-index.hbs

@@ -23,7 +23,6 @@
   {{! prettier-ignore }}
   <pre>
     cd /var/discourse
-    git pull
     ./launcher rebuild app
   </pre>
   <p>