Removed cmc_string.h as it is no longer needed

src/utl/cmc_string.h

@@ -1,26 +0,0 @@
-/**
- * cmc_string.h
- *
- * Creation Date: 17/07/2019
- *
- * Authors:
- * Leonardo Vencovsky (https://github.com/LeoVen)
- *
- */
-
-/* A very simple fixed size string used by all collections' method to_string */
-
-#ifndef CMC_STRING_H
-#define CMC_STRING_H
-
-#include <inttypes.h>
-#include <stddef.h>
-
-static const size_t cmc_string_len = 200;
-
-struct cmc_string
-{
-    char s[200];
-};
-
-#endif /* CMC_STRING_H */