Remove Ed from PCM maintainers

This was leftover from lots of input I gave way back when on the overall
design for phosphor-certificate-manager.  I've never been a primary
reviewer, nor do I generally understand the code enough to make good
CLs.  Feel free to CC me on changes that I need to be aware of, like
ones that make changes to Redfish.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Id046c9957dbc7ffa29f009d1f9314d78eddadd43
diff --git a/OWNERS b/OWNERS
index e4c5ea3..86494b4 100644
--- a/OWNERS
+++ b/OWNERS
@@ -49,9 +49,6 @@
 - name: Devender Rao
   email: devenrao@in.ibm.com
   discord: devender
-- name: Ed Tanous
-  email: ed@tanous.net
-  discord: edtanous
 - name: Jayanth Othayoth
   email: ojayanth@in.ibm.com
   discord: Jayanth