diff --git a/src/hashmap.h b/src/hashmap.h
deleted file mode 100644
index e16cb91..0000000
--- a/src/hashmap.h
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * hashmap.h - integer hashmap definitions
- *
- * Copyright (C) 2019 Emmanuel Marty
- *
- * This software is provided 'as-is', without any express or implied
- * warranty.  In no event will the authors be held liable for any damages
- * arising from the use of this software.
- *
- * Permission is granted to anyone to use this software for any purpose,
- * including commercial applications, and to alter it and redistribute it
- * freely, subject to the following restrictions:
- *
- * 1. The origin of this software must not be misrepresented; you must not
- *    claim that you wrote the original software. If you use this software
- *    in a product, an acknowledgment in the product documentation would be
- *    appreciated but is not required.
- * 2. Altered source versions must be plainly marked as such, and must not be
- *    misrepresented as being the original software.
- * 3. This notice may not be removed or altered from any source distribution.
- */
-
-/*
- * Uses the libdivsufsort library Copyright (c) 2003-2008 Yuta Mori
- *
- * Inspired by LZ4 by Yann Collet. https://github.com/lz4/lz4
- * With help, ideas, optimizations and speed measurements by spke <zxintrospec@gmail.com>
- * With ideas from Lizard by Przemyslaw Skibinski and Yann Collet. https://github.com/inikep/lizard
- * Also with ideas from smallz4 by Stephan Brumme. https://create.stephan-brumme.com/smallz4/
- *
- */
-
-#ifndef _HASHMAP_H
-#define _HASHMAP_H
-
-#include <stdlib.h>
-
-/** Number of hashmap buckets */
-#define LZSA_HASH_NBUCKETS 256
-
-/* Forward definitions */
-typedef struct _lzsa_hashvalue_t lzsa_hashvalue_t;
-typedef struct _lzsa_hashbuffer_t lzsa_hashbuffer_t;
-
-/** One hashmap bucket entry */
-typedef struct _lzsa_hashvalue_t {
-   lzsa_hashvalue_t *pNext;
-   unsigned long long key;
-   unsigned int value;
-} lzsa_hashvalue_t;
-
-/** One buffer storing hashmap bucket entries */
-typedef struct _lzsa_hashbuffer_t {
-   lzsa_hashbuffer_t *pNext;
-   int nFreeEntryIdx;
-   lzsa_hashvalue_t value[255];
-} lzsa_hashbuffer_t;
-
-/** Hashmap */
-typedef struct {
-   lzsa_hashbuffer_t *pBuffer;
-   lzsa_hashvalue_t *pBucket[LZSA_HASH_NBUCKETS];
-} lzsa_hashmap_t;
-
-/**
- * Initialize hashmap
- *
- * @param pHashMap hashmap
- */
-void lzsa_hashmap_init(lzsa_hashmap_t *pHashMap);
-
-/**
- * Set value for key
- *
- * @param pHashMap hashmap
- * @param key key to set value for
- * @param value new value
- */
-void lzsa_hashmap_insert(lzsa_hashmap_t *pHashMap, unsigned long long key, unsigned int value);
-
-/**
- * Get value for key
- *
- * @param pHashMap hashmap
- * @param key key to get value for
- * @param pValue pointer to where to store value if found
- *
- * @return 0 if found, nonzero if not found
- */
-int lzsa_hashmap_find(lzsa_hashmap_t *pHashMap, unsigned long long key, unsigned int *pValue);
-
-/**
- * Clear hashmap
- *
- * @param pHashMap hashmap
- */
-void lzsa_hashmap_clear(lzsa_hashmap_t *pHashMap);
-
-#endif   /* _HASHMAP_H */