kubelet_volumes.go executing rmdir against regular files while trying to clean up orphaned pods

In a customer environement was identtified that while cleaning up orphaned pods kubelet is failing to execute rmdir against a regular file.     

    4.12.44

    On customer cluster.

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    Clean up process failing because rmdir return an error when executed against a regular file.

Clean up process should not execute rmdir against a reglar file.