diff --git a/library/log4php/LoggerHierarchy.php b/library/log4php/LoggerHierarchy.php
deleted file mode 100644
--- a/library/log4php/LoggerHierarchy.php
+++ /dev/null
@@ -1,257 +0,0 @@
-<?php
-/**
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- *       http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * @package log4php
- */
-
-/**
- * This class is specialized in retrieving loggers by name and also maintaining
- * the logger hierarchy. The logger hierarchy is dealing with the several Log-Levels
- * Logger can have. From log4j website:
- *
- * "A logger is said to be an ancestor of another logger if its name followed
- * by a dot is a prefix of the descendant logger name. A logger is said to be
- * a parent of a child logger if there are no ancestors between itself and the
- * descendant logger."
- *
- * Child Loggers do inherit their Log-Levels from their Ancestors. They can
- * increase their Log-Level compared to their Ancestors, but they cannot decrease it.
- *
- * <p>The casual user does not have to deal with this class directly.</p>
- *
- * <p>The structure of the logger hierarchy is maintained by the
- * getLogger method. The hierarchy is such that children link
- * to their parent but parents do not have any pointers to their
- * children. Moreover, loggers can be instantiated in any order, in
- * particular descendant before ancestor.</p>
- *
- * <p>In case a descendant is created before a particular ancestor,
- * then it creates a provision node for the ancestor and adds itself
- * to the provision node. Other descendants of the same ancestor add
- * themselves to the previously created provision node.</p>
- *
- * @version $Revision: 1394956 $
- * @package log4php
- */
-class LoggerHierarchy {
-
-    /** Array holding all Logger instances. */
-    protected $loggers = array();
-
-    /**
-     * The root logger.
-     * @var RootLogger
-     */
-    protected $root;
-
-    /**
-     * The logger renderer map.
-     * @var LoggerRendererMap
-     */
-    protected $rendererMap;
-
-    /**
-     * Main level threshold. Events with lower level will not be logged by any
-     * logger, regardless of it's configuration.
-     * @var LoggerLevel
-     */
-    protected $threshold;
-
-    /**
-     * Creates a new logger hierarchy.
-     * @param LoggerRoot $root The root logger.
-     */
-    public function __construct(LoggerRoot $root) {
-        $this->root = $root;
-        $this->setThreshold(LoggerLevel::getLevelAll());
-        $this->rendererMap = new LoggerRendererMap();
-    }
-
-    /**
-     * Clears all loggers.
-     */
-    public function clear() {
-        $this->loggers = array();
-    }
-
-    /**
-     * Check if the named logger exists in the hierarchy.
-     * @param string $name
-     * @return boolean
-     */
-    public function exists($name) {
-        return isset($this->loggers[$name]);
-    }
-
-    /**
-     * Returns all the currently defined loggers in this hierarchy as an array.
-     * @return array
-     */
-    public function getCurrentLoggers() {
-        return array_values($this->loggers);
-    }
-
-    /**
-     * Returns a named logger instance logger. If it doesn't exist, one is created.
-     *
-     * @param string $name Logger name
-     * @return Logger Logger instance.
-     */
-    public function getLogger($name) {
-        if (!isset($this->loggers[$name])) {
-            $logger = new Logger($name);
-
-            $nodes = explode('.', $name);
-            $firstNode = array_shift($nodes);
-
-            // if name is not a first node but another first node is their
-            if ($firstNode != $name and isset($this->loggers[$firstNode])) {
-                $logger->setParent($this->loggers[$firstNode]);
-            } else {
-                // if there is no father, set root logger as father
-                $logger->setParent($this->root);
-            }
-
-            // if there are more nodes than one
-            if (count($nodes) > 0) {
-                // find parent node
-                foreach ($nodes as $node) {
-                    $parentNode = "$firstNode.$node";
-                    if (isset($this->loggers[$parentNode]) and $parentNode != $name) {
-                        $logger->setParent($this->loggers[$parentNode]);
-                    }
-                    $firstNode .= ".$node";
-                }
-            }
-
-            $this->loggers[$name] = $logger;
-        }
-
-        return $this->loggers[$name];
-    }
-
-    /**
-     * Returns the logger renderer map.
-     * @return LoggerRendererMap
-     */
-    public function getRendererMap() {
-        return $this->rendererMap;
-    }
-
-    /**
-     * Returns the root logger.
-     * @return LoggerRoot
-     */
-    public function getRootLogger() {
-        return $this->root;
-    }
-
-    /**
-     * Returns the main threshold level.
-     * @return LoggerLevel
-     */
-    public function getThreshold() {
-        return $this->threshold;
-    }
-
-    /**
-     * Returns true if the hierarchy is disabled for given log level and false
-     * otherwise.
-     * @return boolean
-     */
-    public function isDisabled(LoggerLevel $level) {
-        return ($this->threshold->toInt() > $level->toInt());
-    }
-
-    /**
-     * Reset all values contained in this hierarchy instance to their
-     * default.
-     *
-     * This removes all appenders from all loggers, sets
-     * the level of all non-root loggers to <i>null</i>,
-     * sets their additivity flag to <i>true</i> and sets the level
-     * of the root logger to {@link LOGGER_LEVEL_DEBUG}.
-     *
-     * <p>Existing loggers are not removed. They are just reset.
-     *
-     * <p>This method should be used sparingly and with care as it will
-     * block all logging until it is completed.</p>
-     */
-    public function resetConfiguration() {
-        $root = $this->getRootLogger();
-
-        $root->setLevel(LoggerLevel::getLevelDebug());
-        $this->setThreshold(LoggerLevel::getLevelAll());
-        $this->shutDown();
-
-        foreach ($this->loggers as $logger) {
-            $logger->setLevel(null);
-            $logger->setAdditivity(true);
-            $logger->removeAllAppenders();
-        }
-
-        $this->rendererMap->reset();
-        LoggerAppenderPool::clear();
-    }
-
-    /**
-     * Sets the main threshold level.
-     * @param LoggerLevel $l
-     */
-    public function setThreshold(LoggerLevel $threshold) {
-        $this->threshold = $threshold;
-    }
-
-    /**
-     * Shutting down a hierarchy will <i>safely</i> close and remove
-     * all appenders in all loggers including the root logger.
-     *
-     * The shutdown method is careful to close nested
-     * appenders before closing regular appenders. This is allows
-     * configurations where a regular appender is attached to a logger
-     * and again to a nested appender.
-     *
-     * @todo Check if the last paragraph is correct.
-     */
-    public function shutdown() {
-        $this->root->removeAllAppenders();
-
-        foreach ($this->loggers as $logger) {
-            $logger->removeAllAppenders();
-        }
-    }
-
-    /**
-     * Prints the current Logger hierarchy tree. Useful for debugging.
-     */
-    public function printHierarchy() {
-        $this->printHierarchyInner($this->getRootLogger(), 0);
-    }
-
-    private function printHierarchyInner(Logger $current, $level) {
-        for ($i = 0; $i < $level; $i++) {
-            echo ($i == $level - 1) ? "|--" : "|  ";
-        }
-        echo $current->getName() . "\n";
-
-        foreach ($this->loggers as $logger) {
-            if ($logger->getParent() == $current) {
-                $this->printHierarchyInner($logger, $level + 1);
-            }
-        }
-    }
-}