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Checked the changelog, this change was made in 1.13:

kube-scheduler dropped support for configuration files with apiVersion componentconfig/v1alpha1. Ensure kube-scheduler is configured using command-line flags or a configuration file with apiVersion kubescheduler.config.k8s.io/v1alpha1 before upgrading to 1.13.

/lgtm
/approve

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tengqm

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