Add POLARSSL_DEPRECATED_{WARNING,REMOVED}
diff --git a/library/md.c b/library/md.c
index fbdab91..cf4d7e3 100644
--- a/library/md.c
+++ b/library/md.c
@@ -203,12 +203,14 @@
     return( 0 );
 }
 
+#if ! defined(POLARSSL_DEPRECATED_REMOVED)
 int md_free_ctx( md_context_t *ctx )
 {
     md_free( ctx );
 
     return( 0 );
 }
+#endif
 
 int md_starts( md_context_t *ctx )
 {