Remove Sam-I-am from accessbot
Remove Sam-I-am from accessbot

Matt is not active in OpenStack anymore, remove him from the operator
list.

See also
http://lists.openstack.org/pipermail/openstack-dev/2016-December/109302.html

Change-Id: I59c7b3b03bb27676ff5b4640009e1dfc29e18028

openstack-infra/project-config,openstack-infra/project-config