Revert "Merge pull request #20 from munnerz/logr"

[liggitt]

This reverts commit cd60aa4, reversing
changes made to a6a74fb.

What this PR does / why we need it:
Reverts API-breaking changes in advance of klog/v2

After merging this, the plan is to tag v1.0.0 and switch the module declaration to k8.io/klog/v2 before making breaking changes.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
xref kubernetes/client-go#677 Azure/phippyandfriends#30 DataDog/dd-trace-go#482 kubernetes/client-go#658 kubernetes/client-go#656 kubernetes/client-go#654 kubernetes/client-go#652

See discussion in #20 (comment)

/cc @dims @munnerz @deads2k @DirectXMan12

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[dims]

/approve
/lgtm

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[lavalamp]

Thanks; I strongly agree that klog should do versions properly.