Remove flags as test uses KubeletConfiguration
Remove flags as test uses KubeletConfiguration

PR [#104302](https://github.com/kubernetes/kubernetes/pull/104302)
moves the lock contention flags to KubeletConfiguration.

Once that is merged, the lock contention flags will be invalid. The E2E
test is already updated to use Kubelet configuration.

Signed-off-by: Imran Pochi <d6d3ccaa384a65532061e26836842adc48d43df4@kinvolk.io>

kubernetes/test-infra,cjwagner/test-infra,michelle192837/test-infra,kubernetes/test-infra,dims/test-infra,kubernetes/test-infra,BenTheElder/test-infra,dims/test-infra,fejta/test-infra,kubernetes/test-infra,jessfraz/test-infra,kubernetes/test-infra,dims/test-infra,michelle192837/test-infra,michelle192837/test-infra,cblecker/test-infra,cblecker/test-infra,dims/test-infra,BenTheElder/test-infra,jessfraz/test-infra,kubernetes/test-infra,michelle192837/test-infra,BenTheElder/test-infra,cjwagner/test-infra,jessfraz/test-infra,fejta/test-infra,cjwagner/test-infra,jessfraz/test-infra,cjwagner/test-infra,dims/test-infra,cblecker/test-infra,fejta/test-infra,michelle192837/test-infra,BenTheElder/test-infra,BenTheElder/test-infra,jessfraz/test-infra,jessfraz/test-infra,fejta/test-infra,cblecker/test-infra,dims/test-infra,fejta/test-infra,michelle192837/test-infra,BenTheElder/test-infra,cjwagner/test-infra,cjwagner/test-infra,cblecker/test-infra,cblecker/test-infra,fejta/test-infra