Remove unused k8s file

[bourgeoisor]

Fixes #557

cc: @shannonxtreme

[NimJay]

Thanks for this clean-up.

Should we also remove /gke-scheduled-autoscaler/k8s/hpa-example.yaml?

Also, I just noticed that the region tag for the following samples are identical:

• /gke-scheduled-autoscaler/k8s/scheduled-autoscaler/hpa-example.yaml
• /gke-scheduled-autoscaler/k8s/hpa-example.yaml

[bourgeoisor]

@NimJay no, hpa-example.yaml is used here: https://cloud.google.com/kubernetes-engine/docs/tutorials/reducing-costs-by-scaling-down-gke-off-hours#deploy_the_example_application

I also don't want to modify any region tags in this PR since it'd require changing the published tutorial source code as well.

[NimJay]

Good find! (You pointed out that gke-scheduled-autoscaler/k8s/hpa-example.yaml is in use.)

Issue: Also, it looks like this deployment-example.yaml is also used by that tutorial.

kubectl apply -f ./k8s

[bourgeoisor]

Oh good catch. I had searched for the file name without realizing that command applied everything at once. Seems like we won't be able to simply remove it after all.