Delete a Management Pack
Be careful while deleting Management Packs. I suggest to first query the Management Pack and verify you’re returning the one you want to delete.
Return all Management Packs by Display Name
get-managementpack | select displayName | sort displayName
Consider backing up the Management Pack before deleting.
Copy the Management Pack you want to delete from the query results, and past that into the following command.
Delete a Management Pack
get-managementpack | where {$_.displayName -eq "MP Name"} | uninstall-managementpack