Remove paulduffin@ from OWNERS

Test: n/a
Change-Id: I24503d403feefbed40475660983493fb2991d9a8
diff --git a/OWNERS b/OWNERS
index 360e8c7..3d48518 100644
--- a/OWNERS
+++ b/OWNERS
@@ -4,6 +4,3 @@
 #
 # Recommended reviewers for non-trivial build rule changes.
 # dwillemsen@google.com
-#
-# Recommended reviewers for testing library dependencies.
-# paulduffin@google.com