Only one invocation of this, not carrying the worth of its indirection

Generally I am wary of including global state checks in the belly of
models. It is one thing to do it as a default parameter, but I think it
is too far to do it inside an actual method.

app/controllers/comments_controller.rb

@@ -38,6 +38,6 @@ class CommentsController < ApplicationController
     end
 
     def require_own_comment
-      head :forbidden unless @comment.creator.current?
+      head :forbidden unless Current.user == @comment.creator
     end
 end

app/models/user.rb

@@ -32,10 +32,6 @@ class User < ApplicationRecord
     end
   end
 
-  def current?
-    Current.user == self
-  end
-
   private
     def deactived_email_address
       email_address.sub(/@/, "-deactivated-#{SecureRandom.uuid}@")