DEVELOPERS: drop minnowboard_max-graphical_defconfig

Drop minnowboard_max-graphical_defconfig from DEVELOPERS as it has been
removed by commit b9bc22ee8a1b98e3d2ab2a4c135e969423eb9d62

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

DEVELOPERS

@@ -2265,7 +2265,6 @@ F:	boot/sun20i-d1-spl/
 F:	configs/avenger96_defconfig
 F:	configs/beagleboneai_defconfig
 F:	configs/lafrite_defconfig
-F:	configs/minnowboard_max-graphical_defconfig
 F:	configs/minnowboard_max_defconfig
 F:	configs/nexbox_a95x_defconfig
 F:	configs/nezha_defconfig