remove cube-encoding manipulation stuff from octascript api

media/scripts/core/octascript/stream.oct

@@ -97,29 +97,6 @@ export var open_zip = @[server,func() { return undef },capi.stream_open_zip]
 */
 export var open_gz = capi.stream_open_gz
 
-/** Function: open_utf8
- Like $open, but treats the file as UTF-8 input, translating to the
- Cube 2 charset on the fly. This is often what you don't want, as you want
- to read the input source as UTF-8 instead of the Cube encoding, but it
- sometimes comes in handy.
-
- Arguments:
- - filename, mode - see $open.
- - file - if provided, this should be a previously opened file stream -
- in that case the prior two arguments are ignored and this is used as
- source stream for the gzip stream. It doesn't close the previous
- stream, merely reuses it. An internal refcounting mechanism makes
- sure the original stream is preserved for as long as the child
- stream is alive.
-
- See also:
- - $open
- - $open_raw
- - $open_zip
- - $open_gz
-*/
-export var open_utf8 = capi.stream_open_utf8
-
 /** Function: type
  Checks if the given value is a file stream. Returns `stream` when it is,
  `closed stream` when it's a closed stream and `undef` when it's not a stream.

src/octa/octaforge/of_lua.cc

@@ -221,18 +221,6 @@ namespace lua
  ? s_push_ret(L, 0, fname) : 1;
  });
 
- LUAICOMMAND(stream_open_utf8, {
- STREAMOPENPARAMS(fname, mode, ud)
- stream *file = NULL;
- if (!lua_isnoneornil(L, 3)) {
- file = s_get_stream(L, 3);
- if (file->refcount < 0) file->refcount = 0;
- file->incref();
- }
- return (!(*ud = openutf8file(fname, mode, file)))
- ? s_push_ret(L, 0, fname) : 1;
- });
-
  #undef STREAMOPENPARAMS
 
  LUAICOMMAND(stream_type, {