diff --git a/library/log4php/LoggerFilter.php b/library/log4php/LoggerFilter.php
deleted file mode 100644
--- a/library/log4php/LoggerFilter.php
+++ /dev/null
@@ -1,126 +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
- */
-
-/**
- * Users should extend this class to implement customized logging
- * event filtering. Note that {@link LoggerCategory} and {@link LoggerAppender},
- * the parent class of all standard
- * appenders, have built-in filtering rules. It is suggested that you
- * first use and understand the built-in rules before rushing to write
- * your own custom filters.
- *
- * <p>This abstract class assumes and also imposes that filters be
- * organized in a linear chain. The {@link #decide
- * decide(LoggerLoggingEvent)} method of each filter is called sequentially,
- * in the order of their addition to the chain.
- *
- * <p>The {@link decide()} method must return one
- * of the integer constants {@link LoggerFilter::DENY},
- * {@link LoggerFilter::NEUTRAL} or {@link LoggerFilter::ACCEPT}.
- *
- * <p>If the value {@link LoggerFilter::DENY} is returned, then the log event is
- * dropped immediately without consulting with the remaining
- * filters.
- *
- * <p>If the value {@link LoggerFilter::NEUTRAL} is returned, then the next filter
- * in the chain is consulted. If there are no more filters in the
- * chain, then the log event is logged. Thus, in the presence of no
- * filters, the default behaviour is to log all logging events.
- *
- * <p>If the value {@link LoggerFilter::ACCEPT} is returned, then the log
- * event is logged without consulting the remaining filters.
- *
- * <p>The philosophy of log4php filters is largely inspired from the
- * Linux ipchains.
- *
- * @version $Revision: 1213283 $
- * @package log4php
- */
-abstract class LoggerFilter extends LoggerConfigurable {
-
-    /**
-     * The log event must be logged immediately without consulting with
-     * the remaining filters, if any, in the chain.
-     */
-    const ACCEPT = 1;
-
-    /**
-     * This filter is neutral with respect to the log event. The
-     * remaining filters, if any, should be consulted for a final decision.
-     */
-    const NEUTRAL = 0;
-
-    /**
-     * The log event must be dropped immediately without consulting
-     * with the remaining filters, if any, in the chain.
-     */
-    const DENY = -1;
-
-    /**
-     * @var LoggerFilter Points to the next {@link LoggerFilter} in the filter chain.
-     */
-    protected $next;
-
-    /**
-     * Usually filters options become active when set. We provide a
-     * default do-nothing implementation for convenience.
-     */
-    public function activateOptions() {
-    }
-
-    /**
-     * Decide what to do.
-     * <p>If the decision is {@link LoggerFilter::DENY}, then the event will be
-     * dropped. If the decision is {@link LoggerFilter::NEUTRAL}, then the next
-     * filter, if any, will be invoked. If the decision is {@link LoggerFilter::ACCEPT} then
-     * the event will be logged without consulting with other filters in
-     * the chain.
-     *
-     * @param LoggerLoggingEvent $event The {@link LoggerLoggingEvent} to decide upon.
-     * @return integer {@link LoggerFilter::NEUTRAL} or {@link LoggerFilter::DENY}|{@link LoggerFilter::ACCEPT}
-     */
-    public function decide(LoggerLoggingEvent $event) {
-        return self::NEUTRAL;
-    }
-
-    /**
-     * Adds a new filter to the filter chain this filter is a part of.
-     * If this filter has already and follow up filter, the param filter
-     * is passed on until it is the last filter in chain.
-     *
-     * @param $filter - the filter to add to this chain
-     */
-    public function addNext($filter) {
-        if ($this->next !== null) {
-            $this->next->addNext($filter);
-        } else {
-            $this->next = $filter;
-        }
-    }
-
-    /**
-     * Returns the next filter in this chain
-     * @return the next filter
-     */
-    public function getNext() {
-        return $this->next;
-    }
-
-}