1 files changed, 0 insertions, 5 deletions
diff --git a/ext/io/console/extconf.rb b/ext/io/console/extconf.rb
index bbd1235986..918f86b27f 100644
--- a/ext/io/console/extconf.rb
+++ b/ext/io/console/extconf.rb
@@ -12,15 +12,10 @@ when have_header(hdr = "sgtty.h")
 else
   ok = false
 end
-ok &&= enable_config("io-console-force-compatible-with-1.8") ||
-  macro_defined?("HAVE_RUBY_IO_H", cpp_include("ruby.h"))
 if ok
   have_header("sys/ioctl.h")
   have_func("rb_check_hash_type", "ruby.h")
   have_func("rb_io_get_write_io", "ruby/io.h")
   have_func("rb_cloexec_open", "ruby/io.h")
-  if enable_config("io-console-rb_scan_args-optional-hash", true)
-    $defs << "-DHAVE_RB_SCAN_ARGS_OPTIONAL_HASH=1"
-  end
   create_makefile("io/console")
 end