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diff --git a/libcds/src/static_sequence/wt_coder_huff.cpp b/libcds/src/static_sequence/wt_coder_huff.cpp
deleted file mode 100644
index 5ba633b..0000000
--- a/libcds/src/static_sequence/wt_coder_huff.cpp
+++ /dev/null
@@ -1,89 +0,0 @@
-/* wt_coder_huff.cpp
- * Copyright (C) 2008, Francisco Claude, all rights reserved.
- *
- * wt_coder_huff definition
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- */
- 
-#include <wt_coder_huff.h>
-
-wt_coder_huff::wt_coder_huff(uint * symbs, uint n, alphabet_mapper * am) {
-  for(uint i=0;i<n;i++)
-    symbs[i] = am->map(symbs[i]);
-	hc = new huffman_codes(symbs, n);
-  buffer = new uint[hc->max_length()/W+1]; 
-  s_len = 0; last_symbol = (uint)-1;
-  for(uint i=0;i<n;i++)
-    symbs[i] = am->unmap(symbs[i]);
-}
-
-wt_coder_huff::wt_coder_huff(uchar * symbs, uint n, alphabet_mapper * am) {
-  for(uint i=0;i<n;i++)
-    symbs[i] = (uchar)am->map((uint)symbs[i]);
-	hc = new huffman_codes(symbs, n);
-  buffer = new uint[hc->max_length()/W+1]; 
-  s_len = 0; last_symbol = (uint)-1;
-  for(uint i=0;i<n;i++)
-    symbs[i] = (uchar)am->unmap((uint)symbs[i]);
-}
-
-wt_coder_huff::wt_coder_huff() {}
-
-wt_coder_huff::~wt_coder_huff() {
-  delete hc;
-  delete [] buffer;
-}
-
-bool wt_coder_huff::is_set(uint symbol, uint l) {
-	if(symbol!=last_symbol) {
-    s_len = (uint)hc->encode(symbol, buffer, (ulong)0);
-    last_symbol = symbol;
-  }
-  return bitget(buffer,l);
-}
-
-bool wt_coder_huff::done(uint symbol, uint l) {
-  if(symbol!=last_symbol) {
-    s_len = (uint)hc->encode(symbol, buffer, (ulong)0);
-    last_symbol = symbol;
-  }
-  return l==s_len;
-}
-
-uint wt_coder_huff::size() {
-  return 2*sizeof(uint)+sizeof(wt_coder_huff)+hc->size()+(hc->max_length()/W+1)*sizeof(uint);
-}
-
-uint wt_coder_huff::save(FILE * fp) {
-  uint wr = WT_CODER_HUFF_HDR;
-  wr = fwrite(&wr,sizeof(uint),1,fp);
-  if(wr!=1) return 1;
-  if(hc->save(fp)) return 1;
-  //if(am->save(fp)) return 1;
-  return 0;
-}
-
-wt_coder_huff * wt_coder_huff::load(FILE *fp) {
-  uint rd;
-  if(fread(&rd,sizeof(uint),1,fp)!=1) return NULL;
-  if(rd!=WT_CODER_HUFF_HDR) return NULL;
-  wt_coder_huff * ret = new wt_coder_huff();
-  ret->hc = huffman_codes::load(fp);
-  ret->buffer = new uint[ret->hc->max_length()/W+1]; 
-  ret->s_len = 0; ret->last_symbol = (uint)-1;
-  return ret;
-}