Small e2e test cleanup

[adrianmoisey]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

While looking at the e2e tests, I thought I'd fix a few minor nits

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

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[jackfrancis]

Do you have the appetite to update these everywhere so we can remove the k8s.io/utils/pointer package from the dependency graph altogether? (less value doing the same for io/ioutil as that's part of the standard lib, but you could do the same there as well if you're starved for dopamine)

[adrianmoisey]

This change removes the last one, from what I can tell. Which other k8s.io/utils/pointer references are left?

[jackfrancis]

ah, I would expect vertical-pod-autoscaler/e2e/vendor/modules.txt would have been updated when the final in-code reference is removed