Nokia RX-51: Remove CONFIG_UBI_SIZE

CONFIG_UBI_SIZE option is not used, so remove it.

Signed-off-by: Pali Rohár <pali@kernel.org>
diff --git a/include/configs/nokia_rx51.h b/include/configs/nokia_rx51.h
index 97aafc5..a88cfe7 100644
--- a/include/configs/nokia_rx51.h
+++ b/include/configs/nokia_rx51.h
@@ -31,8 +31,6 @@
 #define V_OSCK			26000000	/* Clock output from T2 */
 #define V_SCLK			(V_OSCK >> 1)
 
-#define CONFIG_UBI_SIZE			(512 << 10)
-
 /*
  * Hardware drivers
  */