client-go: start fresh with owner file

staging/src/k8s.io/client-go/OWNERS

 approvers:
 - caesarxuchao
 - deads2k
-- krousey
 - lavalamp
+- liggitt
 - smarterclayton
 - sttts
-- liggitt
 reviewers:
-- thockin
-- lavalamp
-- smarterclayton
-- wojtek-t
-- deads2k
-- yujuhong
-- derekwaynecarr
 - caesarxuchao
-- vishh
-- mikedanese
+- deads2k
+- lavalamp
 - liggitt
-- nikhiljindal
-- gmarek
-- erictune
-- davidopp
-- pmorie
-- sttts
-- dchen1107
-- saad-ali
-- zmerlynn
-- luxas
-- janetkuo
-- justinsb
-- roberthbailey
-- ncdc
-- tallclair
-- yifan-gu
-- eparis
-- mwielgus
-- timothysc
-- feiskyer
-- jlowdermilk
 - soltysh
-- piosz
-- jsafrane
-- awly
+- sttts
+- yliaog