As the comments in the code suggest, we can remove this
code now. There was a blocking database migration which
enforced that the online data migrations to generate
uuids for aggregates has been completed:
4d0915568a1011ddee7317ddfb237be0803e7790
So this code is safe to remove now. As a result, we
also remove the online data migration routine which
relies on the object code.
Change-Id: I2050b5bdf906d2d2f8a87c79ca0804e0fc955755
55868cbaf5