MAINTAINERS: remove historic section DEVICE NUMBER REGISTRY

As described in Documentation/admin-guide/devices.rst, the device number
registry (or linux device list) is at Documentation/admin-guide/devices.txt
and no longer maintained at lanana.org.

The devices.txt file is basically community-maintained, and there is no
other dedicated maintainer or contact for that file nowadays.

Remove the historic section DEVICE NUMBER REGISTRY in MAINTAINERS.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20230307144000.29539-2-lukas.bulwahn@gmail.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>

MAINTAINERS

@@ -5940,11 +5940,6 @@ F:	drivers/devfreq/event/
 F:	include/dt-bindings/pmu/exynos_ppmu.h
 F:	include/linux/devfreq-event.h
 
-DEVICE NUMBER REGISTRY
-M:	Torben Mathiasen <device@lanana.org>
-S:	Maintained
-W:	http://lanana.org/docs/device-list/index.html
-
 DEVICE RESOURCE MANAGEMENT HELPERS
 M:	Hans de Goede <hdegoede@redhat.com>
 R:	Matti Vaittinen <mazziesaccount@gmail.com>