DEVELOPERS: remove Manuel Vögele

Manuel Vögele has privately requested to be removed from the
DEVELOPERS file as he is no longer involved with Buildroot
usage/development.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1780,10 +1780,6 @@ F:	package/mpv/
 F:	package/rpi-firmware/
 F:	package/rpi-userland/
 
-N:	Manuel Vögele <develop@manuel-voegele.de>
-F:	package/python-pyqt5/
-F:	package/python-requests-toolbelt/
-
 N:	Marcin Bis <marcin@bis.org.pl>
 F:	package/bluez5_utils/
 F:	package/cc-tool/