virtio bus: Fix resource leak. CID 1032283

* bus is allocated but not deleted and not used
  after an error
debuganalyzer: Fix double free. CID 992566

* RemoveRow frees row, thus the delete isn't
  needed.
Revert "debuganalyzer: Fix double free. CID 992566"

This reverts commit ea27e95f489fbb29cedad74788ee607b331f8a2f.

* AnEvilYak pointed out that this was a false positive as
  BObjectList can optionally delete on remove.
* I'll add a penny to the bitcoin bad commit jar :)