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diff --git a/drivers/webpold/utils/huffman.h b/drivers/webpold/utils/huffman.h
deleted file mode 100644
index f16447e64..000000000
--- a/drivers/webpold/utils/huffman.h
+++ /dev/null
@@ -1,78 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// This code is licensed under the same terms as WebM:
-//  Software License Agreement:  http://www.webmproject.org/license/software/
-//  Additional IP Rights Grant:  http://www.webmproject.org/license/additional/
-// -----------------------------------------------------------------------------
-//
-// Utilities for building and looking up Huffman trees.
-//
-// Author: Urvang Joshi (urvang@google.com)
-
-#ifndef WEBP_UTILS_HUFFMAN_H_
-#define WEBP_UTILS_HUFFMAN_H_
-
-#include <assert.h>
-#include "../types.h"
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-// A node of a Huffman tree.
-typedef struct {
-  int symbol_;
-  int children_;  // delta offset to both children (contiguous) or 0 if leaf.
-} HuffmanTreeNode;
-
-// Huffman Tree.
-typedef struct HuffmanTree HuffmanTree;
-struct HuffmanTree {
-  HuffmanTreeNode* root_;   // all the nodes, starting at root.
-  int max_nodes_;           // max number of nodes
-  int num_nodes_;           // number of currently occupied nodes
-};
-
-// Returns true if the given node is a leaf of the Huffman tree.
-static WEBP_INLINE int HuffmanTreeNodeIsLeaf(
-    const HuffmanTreeNode* const node) {
-  return (node->children_ == 0);
-}
-
-// Go down one level. Most critical function. 'right_child' must be 0 or 1.
-static WEBP_INLINE const HuffmanTreeNode* HuffmanTreeNextNode(
-    const HuffmanTreeNode* node, int right_child) {
-  return node + node->children_ + right_child;
-}
-
-// Releases the nodes of the Huffman tree.
-// Note: It does NOT free 'tree' itself.
-void HuffmanTreeRelease(HuffmanTree* const tree);
-
-// Builds Huffman tree assuming code lengths are implicitly in symbol order.
-// Returns false in case of error (invalid tree or memory error).
-int HuffmanTreeBuildImplicit(HuffmanTree* const tree,
-                             const int* const code_lengths,
-                             int code_lengths_size);
-
-// Build a Huffman tree with explicitly given lists of code lengths, codes
-// and symbols. Verifies that all symbols added are smaller than max_symbol.
-// Returns false in case of an invalid symbol, invalid tree or memory error.
-int HuffmanTreeBuildExplicit(HuffmanTree* const tree,
-                             const int* const code_lengths,
-                             const int* const codes,
-                             const int* const symbols, int max_symbol,
-                             int num_symbols);
-
-// Utility: converts Huffman code lengths to corresponding Huffman codes.
-// 'huff_codes' should be pre-allocated.
-// Returns false in case of error (memory allocation, invalid codes).
-int HuffmanCodeLengthsToCodes(const int* const code_lengths,
-                              int code_lengths_size, int* const huff_codes);
-
-
-#if defined(__cplusplus) || defined(c_plusplus)
-}    // extern "C"
-#endif
-
-#endif  // WEBP_UTILS_HUFFMAN_H_