Fix or suppress warnings

commons/src/main/java/org/apache/commons/httpclient/Cookie.java

@@ -560,6 +560,7 @@ public class Cookie extends NameValuePair implements Serializable, Comparator {
     * Collator for Cookie comparisons.  Could be replaced with references to
     * specific Locales.
     */
+   @SuppressWarnings("unused") // IA/HERITRIX ADDITION
    private static final RuleBasedCollator STRING_COLLATOR =
         (RuleBasedCollator) RuleBasedCollator.getInstance(
                                                 new Locale("en", "US", ""));

commons/src/main/java/org/archive/io/RecordingOutputStream.java

@@ -24,7 +24,6 @@ import it.unimi.dsi.fastutil.io.FastBufferedOutputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
-import java.nio.charset.Charset;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.util.logging.Level;

commons/src/main/java/org/archive/net/ClientFTP.java

@@ -19,7 +19,6 @@
 package org.archive.net;
 
 
-import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.StringReader;
 import java.net.Socket;