DEVELOPERS: remove Bernd Kuhls from libdecor & libfreeglut

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 5db55534af)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>

DEVELOPERS

@@ -397,7 +397,6 @@ F:	package/libcec/
 F:	package/libcodec2/
 F:	package/libcrossguid/
 F:	package/libde265/
-F:	package/libdecor/
 F:	package/libdeflate/
 F:	package/libdisplay-info/
 F:	package/libdrm/
@@ -405,7 +404,6 @@ F:	package/libdvbcsa/
 F:	package/libdvdcss/
 F:	package/libdvdnav/
 F:	package/libdvdread/
-F:	package/libfreeglut/
 F:	package/libfribidi/
 F:	package/libg7221/
 F:	package/libglew/