diff -r 5ae3e5665a0b -r cc93757aeca3 src/net/fortuna/ical4j/util/CompatibilityHints.java
--- a/src/net/fortuna/ical4j/util/CompatibilityHints.java	Thu Feb 12 18:02:00 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,130 +0,0 @@
-/**
- * Copyright (c) 2012, Ben Fortuna
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- *  o Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- *  o 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.
- *
- *  o Neither the name of Ben Fortuna nor the names of any other contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * 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 COPYRIGHT OWNER 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.
- */
-package net.fortuna.ical4j.util;
-
-import java.util.Map;
-
-import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap;
-
-/**
- * $Id$
- * 
- * Created on 9/03/2006
- * 
- * A set of keys used to enable compatibility features.
- * 
- * @author Ben Fortuna
- */
-public final class CompatibilityHints {
-
-    /**
-     * A system property key to enable relaxed unfolding. Relaxed unfolding is enabled by setting this system property
-     * to "true".
-     */
-    public static final String KEY_RELAXED_UNFOLDING = "ical4j.unfolding.relaxed";
-
-    /**
-     * A system property key to enable relaxed parsing. Relaxed parsing is enabled by setting this system property to
-     * "true".
-     */
-    public static final String KEY_RELAXED_PARSING = "ical4j.parsing.relaxed";
-
-    /**
-     * A system property key to enable relaxed validation. Relaxed validation disables validation of certain conformance
-     * rules that many iCalendar implementations do not conform to. Relaxed validation is enabled by setting this system
-     * property to "true".
-     */
-    public static final String KEY_RELAXED_VALIDATION = "ical4j.validation.relaxed";
-
-    /**
-     * A system property key used to enable compatibility with Outlook/Exchange-generated iCalendar files. Outlook
-     * compatibility is enabled by setting this system property to "true".
-     */
-    public static final String KEY_OUTLOOK_COMPATIBILITY = "ical4j.compatibility.outlook";
-
-    /**
-     * A system property key used to enable compatibility with Lotus Notes-generated iCalendar files. Notes
-     * compatibility is enabled by setting this system property to "true".
-     */
-    public static final String KEY_NOTES_COMPATIBILITY = "ical4j.compatibility.notes";
-    
-    /**
-     * Support for vCard features that are not necessarily compatible with the iCalendar standard.
-     */
-    public static final String KEY_VCARD_COMPATIBILITY = "ical4j.compatibility.vcard";
-
-    private static final Map HINTS = new ConcurrentHashMap();
-    // preload known hints from the configurator
-    static {
-        setHintEnabled(KEY_RELAXED_UNFOLDING, "true".equals(Configurator.getProperty(KEY_RELAXED_UNFOLDING)));
-        setHintEnabled(KEY_RELAXED_PARSING, "true".equals(Configurator.getProperty(KEY_RELAXED_PARSING)));
-        setHintEnabled(KEY_RELAXED_VALIDATION, "true".equals(Configurator.getProperty(KEY_RELAXED_VALIDATION)));
-        setHintEnabled(KEY_OUTLOOK_COMPATIBILITY, "true".equals(Configurator.getProperty(KEY_OUTLOOK_COMPATIBILITY)));
-        setHintEnabled(KEY_NOTES_COMPATIBILITY, "true".equals(Configurator.getProperty(KEY_NOTES_COMPATIBILITY)));
-    }
-
-    /**
-     * Constructor made private to enforce static nature.
-     */
-    private CompatibilityHints() {
-    }
-
-    /**
-     * @param key
-     *            a compatibility hint key
-     * @param enabled
-     *            indicates whether to enable or disable the compatibility hint
-     */
-    public static void setHintEnabled(final String key, final boolean enabled) {
-        HINTS.put(key, Boolean.valueOf(enabled));
-    }
-
-    /**
-     * @param key
-     *            a compatibility hint key
-     */
-    public static void clearHintEnabled(final String key) {
-        HINTS.remove(key);
-    }
-
-    /**
-     * @param key
-     *            a compatibility hint key
-     * @return true if the specified compatibility hint is enabled, otherwise false
-     */
-    public static boolean isHintEnabled(final String key) {
-        if (HINTS.get(key) != null) {
-            return ((Boolean) HINTS.get(key)).booleanValue();
-        }
-        return "true".equals(Configurator.getProperty(key));
-    }
-}