Index: ext/libicpf/src/sha256.h
===================================================================
diff -u -N
--- ext/libicpf/src/sha256.h	(revision 338a33bbdb8c82416f0351408eea3243520784e5)
+++ ext/libicpf/src/sha256.h	(revision 0)
@@ -1,32 +0,0 @@
-#ifndef _SHA256_H
-#define _SHA256_H
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-#ifndef uint8
-#define uint8  unsigned char
-#endif
-
-#ifndef uint32
-#define uint32 unsigned long int
-#endif
-
-typedef struct
-{
-    uint32 total[2];
-    uint32 state[8];
-    uint8 buffer[64];
-} sha256_context;
-
-void sha256_starts( sha256_context *ctx );
-void sha256_update( sha256_context *ctx, uint8 *input, uint32 length );
-void sha256_finish( sha256_context *ctx, uint8 digest[32] );
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* sha256.h */