deleted file mode 100644
--- a/lib/strcasestr.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/* Case-insensitive searching in a string.
-   Copyright (C) 2005 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* Find the first occurrence of NEEDLE in HAYSTACK, using case-insensitive
-   comparison.
-   Note: This function may, in multibyte locales, return success even if
-   strlen (haystack) < strlen (needle) !  */
-extern char *strcasestr (const char *haystack, const char *needle);
-
-#ifdef __cplusplus
-}
-#endif