selinux: update the file list in MAINTAINERS

When we removed the checkreqprot and runtime-disable functionality we
also moved the deprecation notices from Documentation/ABI/obsolete
to Documentation/ABI/removed but unfortunately forgot to update the
associated entries in the MAINTAINERS file.  This patch corrects that
problem.
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202303212204.3G5mRatJ-lkp@intel.comSigned-off-by: Paul Moore <paul@paul-moore.com>

MAINTAINERS

@@ -18823,8 +18823,8 @@ S:	Supported
 W:	https://selinuxproject.org
 W:	https://github.com/SELinuxProject
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git
-F:	Documentation/ABI/obsolete/sysfs-selinux-checkreqprot
-F:	Documentation/ABI/obsolete/sysfs-selinux-disable
+F:	Documentation/ABI/removed/sysfs-selinux-checkreqprot
+F:	Documentation/ABI/removed/sysfs-selinux-disable
 F:	Documentation/admin-guide/LSM/SELinux.rst
 F:	include/trace/events/avc.h
 F:	include/uapi/linux/selinux_netlink.h