message: fix(core): update codeowners to remove previous staff
  Ticket:
diff: @@ -74,5 +74,5 @@ yarn.lock tyler@bitgo.com
  modules/express/package-lock.json tyler@bitgo.com
  # NOTHING BELOW THIS LINE
  -CODEOWNERS @BitGo/git-admins @argjv @twtaylorbitgo @CapnMigraine @tylerlevine
  +CODEOWNERS @BitGo/git-admins @argjv @CapnMigraine @tylerlevine
  