Remove duplicated definition of `E_EOF_ERROR`.
@@ -778,7 +778,6 @@ mrb_win32_basicsocket_close(mrb_state *mrb, mrb_value self)
return mrb_nil_value();
}
-#define E_EOF_ERROR (mrb_class_get(mrb, "EOFError"))
static mrb_value
mrb_win32_basicsocket_sysread(mrb_state *mrb, mrb_value self)
{
