DEVELOPERS: remove Bernd Kuhls from pixman & vnstat

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit b65f510fb6ce315957e9aed427ad5bb3db85dda6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -442,7 +442,6 @@ F:	package/perl-timedate/
 F:	package/perl-uri/
 F:	package/perl-www-robotrules/
 F:	package/php/
-F:	package/pixman/
 F:	package/pngquant/
 F:	package/pppd/
 F:	package/privoxy/
@@ -474,7 +473,6 @@ F:	package/transmission/
 F:	package/tvheadend/
 F:	package/unixodbc/
 F:	package/vlc/
-F:	package/vnstat/
 F:	package/wget/
 F:	package/wireless-regdb/
 F:	package/wireless_tools/