Test: Drop ancient unused DateMessage

router/java/test/junit/net/i2p/data/i2np/DateMessage.java

-package net.i2p.data.i2np;
-/*
- * free (adj.): unencumbered; not under the control of others
- * Written by jrandom in 2003 and released into the public domain
- * with no warranty of any kind, either expressed or implied.
- * It probably won't make your computer catch on fire, or eat
- * your children, but it might.  Use at your own risk.
- *
- */
-
-import net.i2p.I2PAppContext;
-import net.i2p.data.DataHelper;
-
-/**
- * Contains the sending router's current time, to sync (and verify sync)
- *
- */
-public class DateMessage extends I2NPMessageImpl {
-    public final static int MESSAGE_TYPE = 16;
-    private long _now;
-    
-    public DateMessage(I2PAppContext context) {
-        super(context);
-        _now = context.clock().now();
-    }
-    
-    public long getNow() { return _now; }
-    public void setNow(long now) { _now = now; }
-    
-    public void readMessage(byte data[], int offset, int dataSize, int type) throws I2NPMessageException {
-        if (type != MESSAGE_TYPE) throw new I2NPMessageException("Message type is incorrect for this message");
-        int curIndex = offset;
-        
-        _now = DataHelper.fromLong(data, curIndex, DataHelper.DATE_LENGTH);
-    }
-    
-    /** calculate the message body's length (not including the header and footer */
-    protected int calculateWrittenLength() { 
-        return DataHelper.DATE_LENGTH; // now
-    }
-    /** write the message body to the output array, starting at the given index */
-    protected int writeMessageBody(byte out[], int curIndex) throws I2NPMessageException {
-        if (_now <= 0) throw new I2NPMessageException("Not enough data to write out");
-        
-        DataHelper.toLong(out, curIndex, DataHelper.DATE_LENGTH, _now);
-        curIndex += DataHelper.DATE_LENGTH;
-        return curIndex;
-    }
-    
-    public int getType() { return MESSAGE_TYPE; }
-    
-    @Override
-    public int hashCode() {
-        return (int)getNow();
-    }
-    
-    @Override
-    public boolean equals(Object object) {
-        if ( (object != null) && (object instanceof DateMessage) ) {
-            DateMessage msg = (DateMessage)object;
-            return msg.getNow() == getNow();
-        } else {
-            return false;
-        }
-    }
-    
-    @Override
-    public String toString() {
-        StringBuilder buf = new StringBuilder();
-        buf.append("[DateMessage: ");
-        buf.append("Now: ").append(_now);
-        buf.append("]");
-        return buf.toString();
-    }
-}