drop old owners

These folks don't work on Android.  Feel free to send patches upstream.

Bug: None
Test: None
Change-Id: I36242fa59ec83b78edc886c5ba9dd65664b5c206
diff --git a/OWNERS b/OWNERS
index 0083bf9..110c7f3 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,4 +1,2 @@
 set noparent
-benchan@google.com
-vapier@google.com
 siyuanh@google.com