diff --git a/app/controllers/list_controller.rb b/app/controllers/list_controller.rb
index 101165396..3b56132a7 100644
--- a/app/controllers/list_controller.rb
+++ b/app/controllers/list_controller.rb
@@ -11,9 +11,6 @@ class ListController < ApplicationController
       user = list_target_user
       list = TopicQuery.new(user, list_opts).public_send("list_#{filter}")
       list.more_topics_url = construct_url_with(filter, list_opts)
-      if list_opts.include?(:category)
-        list.category = Category.where(name: list_opts[:category]).first
-      end
       if [:latest, :hot].include?(filter)
         @description = SiteSetting.site_description
         @rss = filter
@@ -54,7 +51,6 @@ class ListController < ApplicationController
     query = TopicQuery.new(current_user, list_opts)
     list = query.list_latest
     list.more_topics_url = construct_url_with(:latest, list_opts)
-    list.category = @category if @category
     respond(list)
   end
 
diff --git a/app/models/topic_list.rb b/app/models/topic_list.rb
index f782ed650..0d8ed9ca0 100644
--- a/app/models/topic_list.rb
+++ b/app/models/topic_list.rb
@@ -47,11 +47,7 @@ class TopicList
   end
 
   def attributes
-    hash = {'more_topics_url' => page}
-    if @category.present?
-      hash['category'] = @category
-    end
-    hash
+    {'more_topics_url' => page}
   end
 
   def has_rank_details?
diff --git a/app/serializers/topic_list_serializer.rb b/app/serializers/topic_list_serializer.rb
index 9c81c445c..282786cc5 100644
--- a/app/serializers/topic_list_serializer.rb
+++ b/app/serializers/topic_list_serializer.rb
@@ -18,11 +18,7 @@ class TopicListSerializer < ApplicationSerializer
   end
 
   def can_create_topic
-    if object.category.present?
-      scope.can_create?(Topic, object.category)
-    else
-      scope.can_create?(Topic)
-    end
+    scope.can_create?(Topic)
   end
 
   def include_more_topics_url?
diff --git a/lib/guardian.rb b/lib/guardian.rb
index 10fc23337..0d1806ebe 100644
--- a/lib/guardian.rb
+++ b/lib/guardian.rb
@@ -244,9 +244,7 @@ class Guardian
   end
 
   def can_create_topic?(parent)
-    user &&
-    user.trust_level >= SiteSetting.min_trust_to_create_topic.to_i &&
-    can_create_post?(parent)
+    user && user.trust_level >= SiteSetting.min_trust_to_create_topic.to_i && can_create_post?(parent)
   end
 
   def can_create_topic_on_category?(category)