ARM: shmobile: r7s72100: genmai: Remove reference board file

The genmai board now boots using the generic R7S72100 DT machine with
the same feature set as the board file. Remove the board file.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Wolfram Sang <wsa@sang-engineering.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/Makefile

@@ -63,7 +63,6 @@ obj-$(CONFIG_ARCH_SH7372)	+= entry-intc.o
 
 # Board objects
 ifdef CONFIG_ARCH_SHMOBILE_MULTI
-obj-$(CONFIG_MACH_GENMAI)	+= board-genmai-reference.o
 obj-$(CONFIG_MACH_KOELSCH)	+= board-koelsch-reference.o
 obj-$(CONFIG_MACH_LAGER)	+= board-lager-reference.o
 obj-$(CONFIG_MACH_MARZEN)	+= board-marzen-reference.o