fix(ast_function): ast_function_free does not free the ast data

src/utils/ast/ast_function.c

@@ -34,7 +34,9 @@ void ast_free_function(struct ast_function *function_data)
     if (function_data)
     {
         free(function_data->name);
-        ast_free(&function_data->value);
+        // WARNING: this ast will be stored in the function hashmap.
+        // thus, it will be freed from the hashmap.
+        // ast_free(&function_data->value);
         free(function_data);
     }
 }