diff --git a/NEWS.md b/NEWS.md
index a81e9462b..dd1128e86 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -5,6 +5,8 @@ User-visible changes worth mentioning.
 - [#823] Make configuration and specs ORM independent
 - [#777] Add support for public client in password grant flow
 - [#745] Add created_at timestamp to token generation options
+- [#838] Drop `Application#scopes` generator and warning, introduced for
+  upgrading doorkeeper from v2 to v3.
 
 ---
 
diff --git a/lib/doorkeeper/config.rb b/lib/doorkeeper/config.rb
index f07200bb4..9c797f6e3 100644
--- a/lib/doorkeeper/config.rb
+++ b/lib/doorkeeper/config.rb
@@ -10,17 +10,12 @@ def self.configure(&block)
     setup_orm_adapter
     setup_orm_models
     setup_application_owner if @config.enable_application_owner?
-    check_requirements
   end
 
   def self.configuration
     @config || (fail MissingConfiguration)
   end
 
-  def self.check_requirements
-    @orm_adapter.check_requirements!(configuration)
-  end
-
   def self.setup_orm_adapter
     @orm_adapter = "doorkeeper/orm/#{configuration.orm}".classify.constantize
   rescue NameError => e
diff --git a/lib/doorkeeper/orm/active_record.rb b/lib/doorkeeper/orm/active_record.rb
index 328a644a3..6fd973c8e 100644
--- a/lib/doorkeeper/orm/active_record.rb
+++ b/lib/doorkeeper/orm/active_record.rb
@@ -18,22 +18,6 @@ def self.initialize_application_owner!
 
         Doorkeeper::Application.send :include, Doorkeeper::Models::Ownership
       end
-
-      def self.check_requirements!(_config)
-        if ::ActiveRecord::Base.connected? &&
-           ::ActiveRecord::Base.connection.table_exists?(
-             Doorkeeper::Application.table_name
-           )
-          unless Doorkeeper::Application.column_names.include?("scopes")
-            migration_path = '../../../generators/doorkeeper/templates/add_scopes_to_oauth_applications.rb'
-            puts <<-MSG.squish
-[doorkeeper] Missing column: `oauth_applications.scopes`.
-Create the following migration and run `rake db:migrate`.
-            MSG
-            puts File.read(File.expand_path(migration_path, __FILE__))
-          end
-        end
-      end
     end
   end
 end
diff --git a/lib/generators/doorkeeper/application_scopes_generator.rb b/lib/generators/doorkeeper/application_scopes_generator.rb
deleted file mode 100644
index 38146ee08..000000000
--- a/lib/generators/doorkeeper/application_scopes_generator.rb
+++ /dev/null
@@ -1,34 +0,0 @@
-require 'rails/generators/active_record'
-
-class Doorkeeper::ApplicationScopesGenerator < Rails::Generators::Base
-  include Rails::Generators::Migration
-  source_root File.expand_path('../templates', __FILE__)
-  desc 'Copies ActiveRecord migrations to handle upgrade to doorkeeper 2'
-
-  def self.next_migration_number(path)
-    ActiveRecord::Generators::Base.next_migration_number(path)
-  end
-
-  def application_scopes
-    if oauth_applications_exists? && !scopes_column_exists?
-      migration_template(
-        'add_scopes_to_oauth_applications.rb',
-        'db/migrate/add_scopes_to_oauth_applications.rb'
-      )
-    end
-  end
-
-  private
-
-  def scopes_column_exists?
-    ActiveRecord::Base.connection.column_exists?(
-      :oauth_applications,
-      :scopes
-    )
-  end
-
-  # Might be running this before install
-  def oauth_applications_exists?
-    ActiveRecord::Base.connection.table_exists? :oauth_applications
-  end
-end
diff --git a/lib/generators/doorkeeper/templates/add_scopes_to_oauth_applications.rb b/lib/generators/doorkeeper/templates/add_scopes_to_oauth_applications.rb
deleted file mode 100644
index cd1755175..000000000
--- a/lib/generators/doorkeeper/templates/add_scopes_to_oauth_applications.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddScopesToOauthApplications < ActiveRecord::Migration
-  def change
-    add_column :oauth_applications, :scopes, :string, null: false, default: ''
-  end
-end