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diff --git a/src/util/FifoBuffer.hxx b/src/util/FifoBuffer.hxx
deleted file mode 100644
index 75d2d2ef2..000000000
--- a/src/util/FifoBuffer.hxx
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Copyright (C) 2003-2010 Max Kellermann <max@duempel.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - 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 THE COPYRIGHT HOLDERS AND 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 THE
- * FOUNDATION OR 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 FIFO_BUFFER_HPP
-#define FIFO_BUFFER_HPP
-
-#include "WritableBuffer.hxx"
-
-#include <utility>
-#include <algorithm>
-
-#include <assert.h>
-#include <stddef.h>
-
-/**
- * A first-in-first-out buffer: you can append data at the end, and
- * read data from the beginning.  This class automatically shifts the
- * buffer as needed.  It is not thread safe.
- */
-template<class T, size_t size>
-class FifoBuffer {
-public:
-  typedef size_t size_type;
-
-public:
-  typedef WritableBuffer<T> Range;
-
-protected:
-  size_type head, tail;
-  T data[size];
-
-public:
-  constexpr
-  FifoBuffer():head(0), tail(0) {}
-
-protected:
-  void Shift() {
-    if (head == 0)
-      return;
-
-    assert(head <= size);
-    assert(tail <= size);
-    assert(tail >= head);
-
-    std::move(data + head, data + tail, data);
-
-    tail -= head;
-    head = 0;
-  }
-
-public:
-  void Clear() {
-    head = tail = 0;
-  }
-
-  bool IsEmpty() const {
-    return head == tail;
-  }
-
-  bool IsFull() const {
-    return head == 0 && tail == size;
-  }
-
-  /**
-   * Prepares writing.  Returns a buffer range which may be written.
-   * When you are finished, call append().
-   */
-  Range Write() {
-    Shift();
-    return Range(data + tail, size - tail);
-  }
-
-  /**
-   * Expands the tail of the buffer, after data has been written to
-   * the buffer returned by write().
-   */
-  void Append(size_type n) {
-    assert(tail <= size);
-    assert(n <= size);
-    assert(tail + n <= size);
-
-    tail += n;
-  }
-
-  /**
-   * Return a buffer range which may be read.  The buffer pointer is
-   * writable, to allow modifications while parsing.
-   */
-  Range Read() {
-    return Range(data + head, tail - head);
-  }
-
-  /**
-   * Marks a chunk as consumed.
-   */
-  void Consume(size_type n) {
-    assert(tail <= size);
-    assert(head <= tail);
-    assert(n <= tail);
-    assert(head + n <= tail);
-
-    head += n;
-  }
-};
-
-#endif