While i really wouldn't suggest to completely disable it, this, of course, is configurable.
There are 2 convars which define the behavior, both of these can be configured in "../cfg/sourcemod/plugin.calladmin_mysql.cfg".
Please note that if you disable the entrypruning, the orphaned entrypruning will be disabled too.
The reason we build this in is to not clutter your database with useless junk, you usually take care of an report and be done with it.
The interval is 5 minutes by the way.