Delete io.h

solution/include/io.h

-#ifndef ASSIGNMENT_IMAGE_ROTATION_IO_H
-#define ASSIGNMENT_IMAGE_ROTATION_IO_H
-
-#include <stdbool.h>
-#include <stdio.h>
-
-enum io_return_code {
-    OPEN_SUCCESS = 0,
-    CLOSE_SUCCESS,
-    OPEN_FAILED,
-    CLOSE_FAILED,
-    FILE_CLOSED,
-};
-
-extern const char *io_return_code_string[];
-
-enum io_return_code file_open(const char *file_name, FILE **file, const char *mode);
-
-enum io_return_code file_close(FILE *file);
-
-#endif //ASSIGNMENT_IMAGE_ROTATION_IO_H