Move Ed from maintainer to reviewer

Josh has been doing an excellent job of fielding phosphor-pid-control
related activities, and at this moment, I feel like he can do a better
job of fielding new features/bug fixes than I can.

As such, I've moved myself from the maintainers list to the reviewers
list.  I'm still happy to help clarify intent, discuss new features, and
help with code reviews from time to time, but all of these are things
that Josh has done an excellent job of, and doesn't need my direct input
to continue.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ic52cdb3746ef1cf8e54d1e5d4a0e17b2c3051680
diff --git a/OWNERS b/OWNERS
index 62941ac..d6915b2 100644
--- a/OWNERS
+++ b/OWNERS
@@ -32,10 +32,10 @@
 # data within them will be kept sorted.
 
 owners:
-- edtanous@google.com
 - krellan@google.com
 
 reviewers:
+- edtanous@google.com
 
 matchers: