DEVELOPERS: remove Bartosz Bilas from cegui

I no longer use this package.

Signed-off-by: Bartosz Bilas <b.bilas@grinn-global.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 192e1d2147a3de03ac68126b1bedecf1abee4948)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -304,7 +304,6 @@ F:	package/git/
 N:	Bartosz Bilas <b.bilas@grinn-global.com>
 F:	board/stmicroelectronics/stm32mp157a-dk1/
 F:	configs/stm32mp157a_dk1_defconfig
-F:	package/cegui/
 F:	package/log4qt/
 F:	package/python-esptool/
 F:	package/python-pyaes/