Remove upmin-admin gem

Gemfile

@@ -19,7 +19,6 @@ gem 'pg'
 gem 'puma'
 gem 'pundit'
 gem 'simple_form'
-gem 'upmin-admin'
 gem 'dotenv-rails'
 gem 'react-rails'
 # gem 'react-rails-hot-loader'

Gemfile.lock

@@ -100,7 +100,6 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.5)
       xpath (~> 3.2)
-    chartkick (3.2.1)
     childprocess (3.0.0)
     coderay (1.1.2)
     coffee-rails (5.0.0)
@@ -205,18 +204,6 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (2.2.0)
-    kaminari (1.1.1)
-      activesupport (>= 4.1.0)
-      kaminari-actionview (= 1.1.1)
-      kaminari-activerecord (= 1.1.1)
-      kaminari-core (= 1.1.1)
-    kaminari-actionview (1.1.1)
-      actionview
-      kaminari-core (= 1.1.1)
-    kaminari-activerecord (1.1.1)
-      activerecord
-      kaminari-core (= 1.1.1)
-    kaminari-core (1.1.1)
     launchy (2.4.3)
       addressable (~> 2.3)
     listen (3.2.0)
@@ -253,8 +240,6 @@ GEM
     parser (2.6.5.0)
       ast (~> 2.4.0)
     pg (1.1.4)
-    polyamorous (2.3.0)
-      activerecord (>= 5.0)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
@@ -300,12 +285,6 @@ GEM
       thor (>= 0.19.0, < 2.0)
     rainbow (3.0.0)
     rake (13.0.0)
-    ransack (2.3.0)
-      actionpack (>= 5.0)
-      activerecord (>= 5.0)
-      activesupport (>= 5.0)
-      i18n
-      polyamorous (= 2.3.0)
     rb-fchange (0.0.6)
       ffi
     rb-fsevent (0.10.3)
@@ -403,14 +382,6 @@ GEM
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.6.0)
-    upmin-admin (0.1.3)
-      chartkick
-      haml (>= 3.0.0)
-      jquery-rails
-      kaminari
-      rails
-      ransack
-      sass-rails
     warden (1.2.8)
       rack (>= 2.0.6)
     websocket-driver (0.7.1)
@@ -477,7 +448,6 @@ DEPENDENCIES
   sprockets (~> 3.7)
   turbolinks
   uglifier
-  upmin-admin
 
 RUBY VERSION
    ruby 2.6.0p0

config/initializers/upmin.rb

@@ -1,24 +0,0 @@
-# config/initializers/upmin.rb
-# Extends the Upmin ApplicationController to limit access to users with an admin role.
-# Depends on Devise for authentication plus role-based authorization.
-# Be sure to restart your server when you modify this file.
-module AdminOnly
-  extend ActiveSupport::Concern
-
-  included do
-    before_action :authenticate_user!
-    before_action :admin_only
-  end
-
-  private
-
-  def admin_only
-    unless current_user.admin?
-      redirect_to :back, alert: 'Access denied.'
-    end
-    rescue ActionController::RedirectBackError
-      redirect_to '/', alert: 'Access denied.'
-  end
-end
-
-Upmin::ApplicationController.send :include, AdminOnly

config/routes.rb

@@ -39,7 +39,6 @@ Rails.application.routes.draw do
     end
   end
 
-  mount Upmin::Engine => '/admin'
   root to: 'visitors#index'
   get '/play-now', to: 'tables#play_now', as: 'play_now'
   devise_for :users, controllers: { registrations: "users/registrations" }