env: Remove CONFIG_ENV_AES support

This support has been deprecated since v2017.09 due to security issues.
We now remove this support.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/tools/env/Makefile b/tools/env/Makefile
index 95b28c0..95a03c9 100644
--- a/tools/env/Makefile
+++ b/tools/env/Makefile
@@ -25,7 +25,7 @@
 
 lib-y += fw_env.o \
 	crc32.o ctype.o linux_string.o \
-	env_attr.o env_flags.o aes.o
+	env_attr.o env_flags.o
 
 fw_printenv-objs := fw_env_main.o $(lib-y)