feat: remove gmssl header

include/gmssl/file.h

@@ -1,29 +0,0 @@
-/*
- *  Copyright 2014-2023 The GmSSL Project. All Rights Reserved.
- *
- *  Licensed under the Apache License, Version 2.0 (the License); you may
- *  not use this file except in compliance with the License.
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- */
-
-#ifndef GMSSL_FILE_H
-#define GMSSL_FILE_H
-
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-int file_size(FILE *fp, size_t *size);
-int file_read_all(const char *file, uint8_t **out, size_t *outlen);
-
-
-#ifdef __cplusplus
-}
-#endif
-#endif