[OWNERS] Remove former team members

Change-Id: Ibf557f05cf5c686c8e74ac55a4b90f7bf030de31
Reviewed-on: https://fuchsia-review.googlesource.com/c/infra/3pp/+/1031094
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
Fuchsia-Auto-Submit: Rob Mohr <mohrr@google.com>
Reviewed-by: Danielle Kay <danikay@google.com>
diff --git a/OWNERS b/OWNERS
index 7192cc9..209d096 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,7 +1,4 @@
 danikay@google.com
 ihuh@google.com
 mohrr@google.com
-nicoh@google.com
-nmulcahey@google.com
 olivernewman@google.com
-yupingz@google.com