Revert httpcache integration

[saschagrunert]

What type of PR is this?

/kind bug

What this PR does / why we need it:

The httpcache transport is breaking authentication where no fix seems to
be implemented yet. I'd propose to revert the change for now to be able
to use authenticated requests in tools like
k/release/cmd/release-notes.

Refers to: google/go-github#1503, gregjones/httpcache#104

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

Reverts #58

Does this PR introduce a user-facing change?

Fixed broken authorization caused by httpcache.

[saschagrunert]

cc @wilsonehusin

[saschagrunert]

@cpanato PTAL, I think we also require a new release after this PR got merged.

[cpanato]

will we get this back when the issue in upstream is fixed?

[saschagrunert]

will we get this back when the issue in upstream is fixed?

Yes, but since the PR is open for a long time and the project overall seems to have got no modifications in the last couple of years I doubt that it will get merged soon.

[cpanato]

/lgtm

[k8s-ci-robot]

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[cpanato]

@saschagrunert i will run the release, sounds good?

[saschagrunert]

@saschagrunert i will run the release, sounds good?

Awesome, thank you!