This reverts commit 33f01fa3c2f32f447ed36f00fea68321c3991c2e.
There are a few issues with the patch - see my comments there.
The most pressing and the reasons to revert are:
1) It breaks deployments when the vmedia is present but does not
have a network_data.json (the case for Metal3).
2) It assumes the presence of Glean which may not be the case.
Neither Julia nor myself have time to thoroughly fix the issue,
leaving a revert as the only option to unblock Metal3.
Change-Id: I3f1a18a4910308699ca8f88d8e814c5efa78baee
Closes-Bug: #2045255
c57deb7e76