remove unsed.

mrblib/file.rb

@@ -12,12 +12,6 @@ class File < IO
     if fd_or_path.kind_of? Fixnum
       super(fd_or_path, mode)
     else
-      if Object.const_defined? :Errno
-        eclass = [Errno::ENOENT, Errno::ENFILE]
-      else
-        eclass = FileError
-      end
-      
       @path = fd_or_path
       begin
         fd = IO.sysopen(@path, mode, perm)

src/io.c

@@ -76,41 +76,6 @@ mrb_io_modestr_to_flags(mrb_state *mrb, const char *mode)
   return flags;
 }
 
-static int
-mrb_io_modenum_to_flags(mrb_state *mrb, int modenum)
-{
-  int flags = 0;
-
-  switch (modenum & (O_RDONLY|O_WRONLY|O_RDWR)) {
-    case O_RDONLY:
-      flags = FMODE_READABLE;
-      break;
-    case O_WRONLY:
-      flags = FMODE_WRITABLE;
-      break;
-    case O_RDWR:
-      flags = FMODE_READWRITE;
-      break;
-  }
-
-  if (modenum & O_APPEND) {
-    flags |= FMODE_APPEND;
-  }
-  if (modenum & O_TRUNC) {
-    flags |= FMODE_TRUNC;
-  }
-  if (modenum & O_CREAT) {
-    flags |= FMODE_CREATE;
-  }
-#ifdef O_BINARY
-  if (modenum & O_BINARY) {
-    flags |= FMODE_BINMODE;
-  }
-#endif
-
-  return flags;
-}
-
 static int
 mrb_io_flags_to_modenum(mrb_state *mrb, int flags)
 {