`mc rm --non-current should remove top level deletemarker (#4037)
`mc rm --non-current should remove top level deletemarker (#4037)

Earlier commit #8eae2e3bbfafe952ecb33904c0d9073871a32169 reverted
this behavior, bringing it back

Co-authored-by: Poorna Krishnamoorthy <68dc2b0de6d2c86d9188e3bb86def8454ca330ce@minio.io>
vadmeste/mc,vadmeste/mc,balamurugana/mc,balamurugana/mc,krisis/mc,minio/mc,minio/mc,krisis/mc