If you get the iPad working again there's a couple of scenarios:
1) If the iPad has not already been restored to factory settings, then you'll want to open Settings/General and there will be a section labelled either "Profiles" or "Device Management" where you can remove the Meraki enrollment profile from the iPad. Then you can delete from Systems Manager.
2) If the iPad was already restored, you can just delete from Systems Manager and it shouldn't return.