cmd/coordinator: don't delete gomote-created VMs in 45 minutes

remote.go has its own timeout tracking. Don't have the GCE VM cleanup
loop also cleaning them up based on VM's "delete-in" metadata.

The GCE VM cleanup loop will still delete unknown VMs if the
coordinator is restarted.

Change-Id: I5803f3c9431d05df8a31758820e082f60a4878fc
Reviewed-on: https://go-review.googlesource.com/12156
Reviewed-by: Austin Clements <austin@google.com>
2 files changed