If you don't need anything from the database then you can removet it from add remove programs and that will do it. If it gives any problem while removing then use windows clean up utility to clean it.
But as you said you want to save the dlo configuration then please do the below steps
1>stop all the Be services
2>Stop the bkupexec(sql) service
3>copy the bedb_dlo.mdf and bdeb_dlo.ldf from c:\program files\symantec\backup exec\data
In this case we have copied the dlo configuration in case you want to migrate the same to different setup
You can copy the complete data folder if you want to save the complete database and want to migrate the job history and job as well. In that case you need not to create them again.