Remove PSA_TO_MD_ERR from ssl_tls.c

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 9f3b3be..bc9f4f8 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -60,14 +60,6 @@
                                  psa_generic_status_to_mbedtls);
 }
 #define PSA_TO_MBEDTLS_ERR(status) local_err_translation(status)
-
-static int local_md_translation(psa_status_t status)
-{
-    return psa_status_to_mbedtls(status, psa_to_md_errors,
-                                 ARRAY_LENGTH(psa_to_md_errors),
-                                 psa_generic_status_to_mbedtls);
-}
-#define PSA_TO_MD_ERR(status) local_md_translation(status)
 #endif
 
 #if defined(MBEDTLS_TEST_HOOKS)