stack/erp5: Remove orphan file and corresponding hash section.

Should have been part of:
  commit c787d04c
  Author: Hardik Juneja <hardik.juneja@nexedi.com>
  Date:   Thu Jun 8 18:39:28 2017 +0200

      remove unnecessary monitor_template section form erp5 stack

stack/erp5/buildout.hash.cfg

@@ -72,10 +72,6 @@ md5sum = cc19560b9400cecbd23064d55c501eec
 filename = instance.cfg.in
 md5sum = b5ac16fdeed8863e465e955ba6d1e12a
 
-[monitor-template-dummy]
-filename = dummy.cfg
-md5sum = 68b329da9893e34099c7d8ad5cb9c940
-
 [template-erp5]
 filename = instance-erp5.cfg.in
 md5sum = 5ea4bcdf74fb429f254af8e8fb7b38a3

stack/erp5/dummy.cfg

-