diff --git a/backends/libyahoo2/yahoo/sha1.h b/backends/libyahoo2/yahoo/sha1.h
deleted file mode 100644
index b42d61300a15c8ba14296cf7af227c20b95b5fcb..0000000000000000000000000000000000000000
--- a/backends/libyahoo2/yahoo/sha1.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/*-
- * Copyright (c) 2001-2003 Allan Saddi <allan@saddi.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY ALLAN SADDI AND HIS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL ALLAN SADDI OR HIS CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _SHA1_H
-#define _SHA1_H
-
-#if HAVE_INTTYPES_H
-# include <inttypes.h>
-#else
-# if HAVE_STDINT_H
-#  include <stdint.h>
-# endif
-#endif
-
-#define SHA1_HASH_SIZE 20
-
-/* Hash size in 32-bit words */
-#define SHA1_HASH_WORDS 5
-
-struct _SHA1Context {
-	uint64_t totalLength;
-	uint32_t hash[SHA1_HASH_WORDS];
-	uint32_t bufferLength;
-	union {
-		uint32_t words[16];
-		uint8_t bytes[64];
-	} buffer;
-#ifdef RUNTIME_ENDIAN
-	int littleEndian;
-#endif				/* RUNTIME_ENDIAN */
-};
-
-typedef struct _SHA1Context SHA1Context;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-	void SHA1Init(SHA1Context *sc);
-	void SHA1Update(SHA1Context *sc, const void *data, uint32_t len);
-	void SHA1Final(SHA1Context *sc, uint8_t hash[SHA1_HASH_SIZE]);
-
-#ifdef __cplusplus
-}
-#endif
-#endif				/* _SHA1_H */