Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79.

third_party/harfbuzz-ng/src/hb-language.h

Index: third_party/harfbuzz-ng/src/hb-language.h
diff --git a/third_party/harfbuzz-ng/src/hb-language.h b/third_party/harfbuzz-ng/src/hb-language.h
deleted file mode 100644
index d3c91fb429a78c60657e265d782f31d102ea9e89..0000000000000000000000000000000000000000
--- a/third_party/harfbuzz-ng/src/hb-language.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2009  Red Hat, Inc.
- *
- *  This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- *
- * Red Hat Author(s): Behdad Esfahbod
- */
-
-#ifndef HB_LANGUAGE_H
-#define HB_LANGUAGE_H
-
-#include "hb-common.h"
-
-HB_BEGIN_DECLS
-
-
-typedef const void *hb_language_t;
-
-hb_language_t
-hb_language_from_string (const char *str);
-
-const char *
-hb_language_to_string (hb_language_t language);
-
-
-HB_END_DECLS
-
-#endif /* HB_LANGUAGE_H */