MAINTAINERS: remove entry after hp100 driver removal

Commit a10079c6 ("staging: remove hp100 driver") removed all files
from ./drivers/staging/hp/, but missed to adjust MAINTAINERS.

Since then, ./scripts/get_maintainer.pl --self-test=patterns complains:

  warning: no file matches F: drivers/staging/hp/hp100.*

So, drop HP100 Driver entry in MAINTAINERS now.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20200429042116.29126-1-lukas.bulwahn@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -7746,11 +7746,6 @@ L:	platform-driver-x86@vger.kernel.org
 S:	Orphan
 F:	drivers/platform/x86/tc1100-wmi.c
 
-HP100:	Driver for HP 10/100 Mbit/s Voice Grade Network Adapter Series
-M:	Jaroslav Kysela <perex@perex.cz>
-S:	Obsolete
-F:	drivers/staging/hp/hp100.*
-
 HPET:	High Precision Event Timers driver
 M:	Clemens Ladisch <clemens@ladisch.de>
 S:	Maintained