diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 5b8c6347..91a2256b 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -13,7 +13,6 @@ class ApplicationController < ActionController::Base
 
   helper_method :current_account
   helper_method :current_session
-  helper_method :current_theme
   helper_method :single_user_mode?
   helper_method :use_seamless_external_login?
 
@@ -98,12 +97,6 @@ class ApplicationController < ActionController::Base
     @current_session ||= SessionActivation.find_by(session_id: cookies.signed['_session_id'])
   end
 
-  def current_theme
-    'default'
-    # : todo :
-    # current_user.setting_theme
-  end
-
   def cache_collection(raw, klass)
     return raw unless klass.respond_to?(:with_includes)
 
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index e76df3e0..d52bc5f6 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -95,7 +95,6 @@ module ApplicationHelper
 
   def body_classes
     output = (@body_classes || '').split(' ')
-    output << "theme-#{current_theme.parameterize}"
     output << 'rtl' if locale_direction == 'rtl'
     output.reject(&:blank?).join(' ')
   end