remove unused handler methods

already defined in the base class

lib/msf/core/handler/reverse_http.rb

@@ -157,19 +157,6 @@ module ReverseHttp
     print_status("Started #{scheme.upcase} reverse handler on #{listener_uri}")
   end
 
-  #
-  # Simply calls stop handler to ensure that things are cool.
-  #
-  def cleanup_handler
-  end
-
-  #
-  # Basically does nothing.  The service is already started and listening
-  # during set up.
-  #
-  def start_handler
-  end
-
   #
   # Removes the / handler, possibly stopping the service if no sessions are
   # active on sub-urls.