Removing Rubocop exclusions

The two remove exclusions have since been "fixed" in the upstream
Rubocop releases. As such, there is no reason to have these exclusions.

Thank you @jcoyne and @dunn for the comments that helped me review if
I could remove these exclusions.

.rubocop_fixme.yml

@@ -53,20 +53,9 @@ Naming/PredicateName:
   Exclude:
     - 'app/helpers/hyrax/collections_helper.rb'
 
-
-# TODO: remove when https://github.com/bbatsov/rubocop/issues/4539 is fixed
-Style/FormatStringToken:
-  Exclude:
-    - 'config/routes.rb'
-
 Style/DateTime:
   Enabled: false
 
-# TODO: remove when https://github.com/bbatsov/rubocop/issues/5161 is fixed
-Style/CommentedKeyword:
-  Exclude:
-    - 'app/models/vocab/fedora_resource_status.rb'
-
 Style/SpecialGlobalVars:
   Exclude:
     - 'tasks/hyrax_dev.rake'