message: Remove duplicate text
diff: @@ -455,7 +455,7 @@ Blueprints
  `Blueprints are Flask's reusable apps <http://flask.pocoo.org/docs/0.12/blueprints/>`_.
  Superset allows you to specify an array of Blueprints
  -an array of Blueprints in your ``superset_config`` module. Here's
  +in your ``superset_config`` module. Here's
  an example on how this can work with a simple Blueprint. By doing
  so, you can expect Superset to serve a page that says "OK"
  at the ``/simple_page`` url. This can allow you to run other things such
  