Remove guard code related to nil disk cids
Remove guard code related to nil disk cids

This is old guard code that was carried forward from an old
implmentation.
This was removed at DK's request so as not to mask faulty calling
logic.

[#107163734](https://www.pivotaltracker.com/story/show/107163734)

Signed-off-by: Tyler Schultz <6b7a73f4f7cffc2a148becd12890940350ddfa95@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh