IDS8247: remove redundant flash.c file

The IDS8247 board is configured to use the CFI flash driver, so drop
the now redundant custom flash.c file.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
diff --git a/board/ids8247/Makefile b/board/ids8247/Makefile
index 032e0a7..2b702ce 100644
--- a/board/ids8247/Makefile
+++ b/board/ids8247/Makefile
@@ -28,7 +28,7 @@
 
 LIB	= $(obj)lib$(BOARD).o
 
-COBJS	= $(BOARD).o flash.o
+COBJS	= $(BOARD).o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))