ARM: uniphier: remove unused macro

This macro is not referenced at all.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/include/configs/uniphier.h b/include/configs/uniphier.h
index 908be26..b0a7daa 100644
--- a/include/configs/uniphier.h
+++ b/include/configs/uniphier.h
@@ -299,8 +299,6 @@
 /* Open Firmware flat tree */
 #define CONFIG_OF_LIBFDT
 
-#define CONFIG_HAVE_ARM_SECURE
-
 /* Memory Size & Mapping */
 #define CONFIG_SYS_SDRAM_BASE		CONFIG_SDRAM0_BASE