Remove unnecessary include, ast_md5_hash() comes from utils.h.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@245344 65c4cc65-6c06-0410-ace0-fbb531ad65f3

tests/test_md5.c

@@ -36,7 +36,6 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/utils.h"
 #include "asterisk/module.h"
 #include "asterisk/test.h"
-#include "asterisk/md5.h"
 
 AST_TEST_DEFINE(md5_test)
 {