remove useless conditional

`prepare_params!` would raise an exception if `params` wasn't
initialized, so it must always be available.  Remove the existence
conditional from the `controller` method.

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index d58293d93b..dd78b9d4fd 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -54,7 +54,7 @@ module ActionDispatch
         # delegate the control back to Rack cascade. Besides, if this is not a default
         # controller, it means we should respect the @scope[:module] parameter.
         def controller(params, raise_on_name_error=true)
-          if params && params.key?(:controller)
+          if params.key?(:controller)
             controller_param = params[:controller]
             controller_reference(controller_param)
           else