🧹 Manually overriding#model_name is a bit odd

Instead, we use the mixin as a kind of
"nod-to-the-odd"

app/furniture/tobias/record.rb

@@ -1,9 +1,7 @@
 class Tobias
   class Record < ApplicationRecord
     self.abstract_class = true
+    extend StripsNamespaceFromModelName
 
-    def self.model_name
-      @_model_name ||= ActiveModel::Name.new(self, ::Tobias)
-    end
   end
 end