Reduce picocoin config a bit more
diff --git a/configs/config-picocoin.h b/configs/config-picocoin.h
index 1a1cd28..eeac5d0 100644
--- a/configs/config-picocoin.h
+++ b/configs/config-picocoin.h
@@ -34,13 +34,11 @@
#define POLARSSL_ASN1_WRITE_C
#define POLARSSL_BASE64_C
#define POLARSSL_BIGNUM_C
-#define POLARSSL_DES_C // ???
#define POLARSSL_ECDSA_C
#define POLARSSL_ECP_C
#define POLARSSL_ENTROPY_C
#define POLARSSL_HMAC_DRBG_C
#define POLARSSL_MD_C
-#define POLARSSL_MD5_C // ???
#define POLARSSL_OID_C
#define POLARSSL_PADLOCK_C
#define POLARSSL_PK_C