diff --git a/app/controllers/application.rb b/app/controllers/application.rb
deleted file mode 100644
--- a/app/controllers/application.rb
+++ /dev/null
@@ -1,76 +0,0 @@
-# Filters added to this controller apply to all controllers in the application.
-# Likewise, all the methods added will be available for all controllers.
-
-class ApplicationController < ActionController::Base
-  # Pick a unique cookie name to distinguish our session data from others'
-  session :session_key => '_grader_session_id'
-
-  SINGLE_USER_MODE_CONF_KEY = 'system.single_user_mode'
-
-  def admin_authorization
-    return false unless authenticate
-    user = User.find(session[:user_id], :include => ['roles'])
-    redirect_to :controller => 'main', :action => 'login' unless user.admin?
-  end
-
-  def authorization_by_roles(allowed_roles)
-    return false unless authenticate
-    user = User.find(session[:user_id])
-    unless user.roles.detect { |role| allowed_roles.member?(role.name) }
-      flash[:notice] = 'You are not authorized to view the page you requested'
-      redirect_to :controller => 'main', :action => 'login'
-      return false
-    end
-  end
-
-  protected
-
-  def authenticate
-    unless session[:user_id]
-      redirect_to :controller => 'main', :action => 'login'
-      return false
-    end
-
-    #Configuration.reload
-    # check if run in single user mode
-    if (Configuration[SINGLE_USER_MODE_CONF_KEY])
-      user = User.find(session[:user_id])
-      if user==nil or user.login != 'root'
-        redirect_to :controller => 'main', :action => 'login'
-        return false
-      end
-    end
-
-    return true
-  end
-
-  def authorization
-    return false unless authenticate
-    user = User.find(session[:user_id])
-    unless user.roles.detect { |role|
-	role.rights.detect{ |right|
-	  right.controller == self.class.controller_name and
-          (right.action == 'all' or right.action == action_name)
-	}
-      }
-      flash[:notice] = 'You are not authorized to view the page you requested'
-      #request.env['HTTP_REFERER'] ? (redirect_to :back) : (redirect_to :controller => 'login')
-      redirect_to :controller => 'main', :action => 'login'
-      return false
-    end
-  end
-
-  def verify_time_limit
-    return true if session[:user_id]==nil
-    user = User.find(session[:user_id], :include => :site)
-    return true if user==nil or user.site == nil
-    if user.site.finished?
-      flash[:notice] = 'Error: the contest on your site is over.'
-      redirect_to :back
-      return false
-    end
-    return true
-  end
-
-end
-