MAINTAINERS: Remove Perry Yuan as DELL WMI HARDWARE PRIVACY SUPPORT maintainer

Recent mails to his Dell address bounced with "user unknown".
So remove him as maintainer.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/c9757d0a-2046-464b-93e1-a2d9ab0ce36b@gmail.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>