DEVELOPERS: remove qemu_cksy

Commit b36c4e594c658d49d19bf388b7fd4a912b6fde42 forgot to remove
board/qemu/csky abd configs/qemu_csky* from DEVELOPERS file

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1105,9 +1105,7 @@ F:	package/reaver/
 N:	Guo Ren <ren_guo@c-sky.com>
 F:	arch/Config.in.csky
 F:	board/csky/
-F:	board/qemu/csky
 F:	configs/csky_*
-F:	configs/qemu_csky*
 
 N:	Gustavo Heinz <gustavo@gsthnz.com>
 F:	package/python-m2crypto/