Remove unused dev_tools helper.

app/controllers/application_controller.rb

@@ -7,7 +7,6 @@ class ApplicationController < ActionController::Base
   before_filter :check_password_expiration
   before_filter :add_abilities
   before_filter :ldap_security_check
-  before_filter :dev_tools if Rails.env == 'development'
   before_filter :default_headers
   before_filter :add_gon_variables
   before_filter :configure_permitted_parameters, if: :devise_controller?
@@ -170,9 +169,6 @@ class ApplicationController < ActionController::Base
     response.headers["Expires"] = "Fri, 01 Jan 1990 00:00:00 GMT"
   end
 
-  def dev_tools
-  end
-
   def default_headers
     headers['X-Frame-Options'] = 'DENY'
     headers['X-XSS-Protection'] = '1; mode=block'