Remove ancient votes code that is no longer used.

lib/guardian/post_guardian.rb

@@ -46,10 +46,7 @@ module PostGuardian
       not(post.trashed?) &&
 
       # don't like your own stuff
-      not(action_key == :like && is_my_own?(post)) &&
-
-      # no voting more than once on single vote topics
-      not(action_key == :vote && opts[:voted_in_topic] && post.topic.has_meta_data_boolean?(:single_vote))
+      not(action_key == :like && is_my_own?(post))
     end
 
     !!result
@@ -75,11 +72,6 @@ module PostGuardian
 
     return can_see_flags?(topic) if PostActionType.is_flag?(type_symbol)
 
-    if type_symbol == :vote
-      # We can see votes if the topic allows for public voting
-      return false if topic.has_meta_data_boolean?(:private_poll)
-    end
-
     true
   end
 
@@ -207,10 +199,6 @@ module PostGuardian
     can_see_post?(post)
   end
 
-  def can_vote?(post, opts = {})
-    post_can_act?(post, :vote, opts: opts)
-  end
-
   def can_change_post_owner?
     is_admin?
   end