The extraction of the monolithic hyperkube binary from its container
image to be used as kubelet was last relevant in Kubernetes 1.16. Since
then, the hyperkube image has been deprecated, the structure of the
image has been changed, and it has ultimately been eliminated in
Kubernetes 1.19.
This change cleans up promenade accordingly.
Reverts the following commits:
* 886007b New CLI option to extract hyperkube
* 32a6c15 hyperkube image in promenade init
* 955deed New source for hyperkube binary definition
Change-Id: Ib62ecdf1af13abe8202a4ba4f86c39b9042ed13f
c7e72942a9