Remove MBEDTLS_MD_C dep in config_psa.h when ECJPAJE is wanted

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h
index 96083d8..342f005 100644
--- a/include/mbedtls/config_psa.h
+++ b/include/mbedtls/config_psa.h
@@ -152,7 +152,6 @@
 #define MBEDTLS_ECP_DP_SECP256R1_ENABLED
 #define MBEDTLS_BIGNUM_C
 #define MBEDTLS_ECP_C
-#define MBEDTLS_MD_C
 #define MBEDTLS_ECJPAKE_C
 #endif /* PSA_WANT_ALG_JPAKE */