Update OWNERS.

nnk's gone :-(

Test: N/A
Change-Id: I24daddb775e4adea1516c063a0d43a89235c0749
diff --git a/OWNERS b/OWNERS
index 0ad1d05..d7cde74 100644
--- a/OWNERS
+++ b/OWNERS
@@ -6,7 +6,6 @@
 jeffv@google.com
 jgalenson@google.com
 jiyong@google.com
-nnk@google.com
 smoreland@google.com
 sspatil@google.com
 trong@google.com