Set support_unencrypted_data to false

All unencrypted columns have been migrated so this can be safely
disabled.

Author: thomasleese

config/application.rb

@@ -81,8 +81,5 @@ class Application < Rails::Application
     config.view_component.previews.paths << Rails.root.join(
       "spec/components/previews"
     )
-
-    # TODO: Remove this once `Note#body` is fully encrypted.
-    config.active_record.encryption.support_unencrypted_data = true
   end
 end