Remove ex-employees from OWNERS files.
Remove ex-employees from OWNERS files.

RB_ID=897331
TBR=true
NO_USER_HOOK=1

koshelev/finagle,mkhq/finagle,twitter/finagle,luciferous/finagle,koshelev/finagle,twitter/finagle,twitter/finagle,spockz/finagle,spockz/finagle,luciferous/finagle,twitter/finagle,mkhq/finagle,mkhq/finagle,spockz/finagle,spockz/finagle,luciferous/finagle,twitter/finagle,mkhq/finagle,koshelev/finagle,koshelev/finagle,luciferous/finagle,luciferous/finagle,spockz/finagle,mkhq/finagle,koshelev/finagle,mkhq/finagle,koshelev/finagle,luciferous/finagle,spockz/finagle