Remove unused C header file from `src/etc.c`
MODIFY
src/etc.c
src/etc.c
/*
-** etc.c -
+** etc.c
**
** See Copyright Notice in mruby.h
*/
#include <mruby/string.h>
#include <mruby/data.h>
#include <mruby/class.h>
-#include <mruby/re.h>
-#include <mruby/irep.h>
MRB_API struct RData*
mrb_data_object_alloc(mrb_state *mrb, struct RClass *klass, void *ptr, const mrb_data_type *type)

Remove unused C header file from `src/etc.c`