remove Retry button

Testing suggests that at least some browsers (like mozilla) cache
things in a way that prevents the href="#" from reloading anything,
so the button didn't work.

Did not see a quick way to fix this better, so just suggest user reload.

templates/configurators/ssh/error.hamlet

@@ -8,5 +8,4 @@
     <pre>
       #{msg}
   <p>
-    <a .btn .btn-primary href="#">
-     Retry
+    To retry setting up the repository, reload this page.