code: public void removeReader(TransactionImpl tx, Object obj)
  	{
  		try
  		{
  			LockEntry lock = new LockEntry(new Identity(obj,getBroker()).toString(), tx.getGUID());
              removeReaderRemote(lock);
  		}
  		catch (Throwable t)
  		{
  			log.error("Cannot remove LockEntry for object " + obj + " in transaction " + tx);
  		}
  	}
docs: remove a reader lock entry for transaction tx on object obj
  from the persistent storage.