Remove postgres backup and upgrade files from spec
Remove postgres backup and upgrade files from spec

[#154583497](https://www.pivotaltracker.com/story/show/154583497)

Signed-off-by: Chris Dutra <7eb54fc324f04033595eb420f2ee7c112fb7259e@pivotal.io>

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