diff --git a/app/controllers/categories_controller.rb b/app/controllers/categories_controller.rb
index 55fa8acf1bc..c5f5b4f6c4f 100644
--- a/app/controllers/categories_controller.rb
+++ b/app/controllers/categories_controller.rb
@@ -40,29 +40,15 @@ class CategoriesController < ApplicationController
     @category = @project.categories.build
   end
 
-  def create # rubocop:disable Metrics/AbcSize
+  def create
     @category = @project.categories.build
     @category.attributes = permitted_params.category
 
     if @category.save
-      respond_to do |format|
-        format.html do
-          flash[:notice] = I18n.t(:notice_successful_create)
-          redirect_to project_settings_categories_path(@project)
-        end
-        format.js do
-          render locals: { project: @project, category: @category }
-        end
-      end
+      flash[:notice] = I18n.t(:notice_successful_create)
+      redirect_to project_settings_categories_path(@project)
     else
-      respond_to do |format|
-        format.html do
-          render action: :new, status: :unprocessable_entity
-        end
-        format.js do
-          render(:update) { |page| page.alert(@category.errors.full_messages.join('\n')) }
-        end
-      end
+      render action: :new, status: :unprocessable_entity
     end
   end
 
diff --git a/app/views/categories/create.js.erb b/app/views/categories/create.js.erb
deleted file mode 100644
index e21944ffa7a..00000000000
--- a/app/views/categories/create.js.erb
+++ /dev/null
@@ -1,30 +0,0 @@
-<%#-- copyright
-OpenProject is an open source project management software.
-Copyright (C) the OpenProject GmbH
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License version 3.
-
-OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
-Copyright (C) 2006-2013 Jean-Philippe Lang
-Copyright (C) 2010-2013 the ChiliProject Team
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-
-See COPYRIGHT and LICENSE files for more details.
-
-++#%>
-
-jQuery('#work_package_category_id').empty().append("<%= escape_javascript(options_from_collection_for_select(project.categories, "id", "name", category.id)) %>");