Minor reword

Author: javiereguiluz

deployment.rst

@@ -138,11 +138,10 @@ If your application uses environment variables instead of these parameters, you
 must define those env vars in your production server using the tools provided by
 your hosting service.
 
-.. tip::
-
-    You need to enable the ``prod`` environment with the environment variable
-    ``SYMFONY_ENV=prod`` (or ``APP_ENV=prod`` if you're
-    using :doc:`Symfony Flex </setup/flex>`)
+At the very least you need to define the ``SYMFONY_ENV=prod`` (or
+``APP_ENV=prod`` if you're using :doc:`Symfony Flex </setup/flex>`) to run the
+application in ``prod`` mode, but depending on your application you may need to
+define other env vars too.
 
 C) Install/Update your Vendors
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~