Revert "Use %transient-key when generating our apt-signing key"

This reverts commit 1434f60394e0486bf50a62412c9d3568e43eff95.

Overkill!

Change-Id: I35a8c859980a157408c1bd1143910e1888b5d23d
Revert "Lots of ruckus to get our apt repo 'signed'."

This reverts commit 9c8a27f73db36d4586be4e886cbb4791c76bafad.

Overkill.

Change-Id: I4345934eed74a9aa509120846f94505aae957d30