refactor(ast): one file per ast_type -- UNSTABLE (3)

src/utils/ast/ast_void.h

@@ -3,6 +3,7 @@
 
 #include <stdbool.h>
 
+#include "utils/lists/lists.h"
 #include "utils/ast/ast.h"
 
 /**
@@ -10,16 +11,10 @@
  */
 bool ast_is_void(struct ast *node);
 
-/**
- * Retrieves the if statement data from the given AST node.
- * Assumes that the node is of type AST_VOID.
- */
-struct ast_void *ast_get_void(struct ast *node);
-
 /**
  * Creates a new AST node representing NOTHING
  * WARNING: data will be a NULL pointer
  */
-struct ast *ast_create_void(struct list *ast_list);
+struct ast *ast_create_void(void);
 
 #endif /* ! AST_VOID_H */