cdrom: update uniform CD-ROM maintainership in MAINTAINERS file

Update maintainership for the uniform CD-ROM driver from Jens Axboe to
Phillip Potter in MAINTAINERS file, to reflect the attempt to pass on
maintainership of this driver to a different individual. Also remove
URL to site which is no longer active.

Suggested-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210904174030.1103-1-phil@philpotter.co.uk
Signed-off-by: Jens Axboe <axboe@kernel.dk>

MAINTAINERS

@@ -19144,9 +19144,8 @@ W:	http://dotat.at/prog/unifdef
 F:	scripts/unifdef.c
 
 UNIFORM CDROM DRIVER
-M:	Jens Axboe <axboe@kernel.dk>
+M:	Phillip Potter <phil@philpotter.co.uk>
 S:	Maintained
-W:	http://www.kernel.dk
 F:	Documentation/cdrom/
 F:	drivers/cdrom/cdrom.c
 F:	include/linux/cdrom.h