omap4: sdp4430: remove CONFIG_4430SDP

This macro is defined, but not referenced by anyone.

I did not touch config_whitelist.txt - the CONFIG will be dropped
by the next re-sync.
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>

include/configs/omap4_sdp4430.h

@@ -16,7 +16,6 @@
 /*
  * High Level Configuration Options
  */
-#define CONFIG_4430SDP		1	/* working with SDP */
 #define CONFIG_MACH_TYPE	MACH_TYPE_OMAP_4430SDP
 
 #include <configs/ti_omap4_common.h>