Remove jeremy from ipc/OWNERS

R=cpu@chromium.org,darin@chromium.org,jam@chromium.org,tsepez@chromium.org,jeremy@chromium.org
(multiple owners as FYI for losing a teammate only need one stamp)

BUG=He no longer works on Chrome and no longer reviews

Review-Url: https://codereview.chromium.org/2027343002
Cr-Commit-Position: refs/heads/master@{#397229}

ipc/OWNERS

@@ -1,7 +1,6 @@
 cpu@chromium.org
 darin@chromium.org
 jam@chromium.org
-jeremy@chromium.org
 tsepez@chromium.org
 
 # New IPC message files require a security review to avoid introducing