pundit: convert forum post votes to pundit.

app/policies/forum_post_vote_policy.rb

@@ -0,0 +1,13 @@
+class ForumPostVotePolicy < ApplicationPolicy
+  def create?
+    unbanned? && policy(record.forum_post).votable?
+  end
+
+  def destroy?
+    unbanned? && record.creator_id == user.id
+  end
+
+  def permitted_attributes
+    [:score]
+  end
+end