ti_armv7_keystone2: env: Remove securedb.key.bin load

securedb.key.bin is not supported so it should not be loaded by
default init_ubi command.

Signed-off-by: Carlos Hernandez <ceh@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

include/configs/ti_armv7_keystone2.h

@@ -252,8 +252,7 @@
 	"run_kern=bootz ${loadaddr} - ${fdtaddr}\0"			\
 	"init_net=run args_all args_net\0"				\
 	"init_ubi=run args_all args_ubi; "				\
-		"ubi part ubifs; ubifsmount ubi:rootfs;"			\
-		"ubifsload ${addr_secdb_key} securedb.key.bin;\0"       \
+		"ubi part ubifs; ubifsmount ubi:rootfs;\0"			\
 	"get_fdt_net=dhcp ${fdtaddr} ${tftp_root}/${name_fdt}\0"	\
 	"get_fdt_ubi=ubifsload ${fdtaddr} ${bootdir}/${name_fdt}\0"		\
 	"get_kern_net=dhcp ${loadaddr} ${tftp_root}/${name_kern}\0"	\