Data: Remove dup check for negative tunnel ID

core/java/src/net/i2p/data/TunnelId.java

@@ -64,7 +64,8 @@ public class TunnelId {
     }
     
     public void writeBytes(OutputStream out) throws DataFormatException, IOException {
-        if (_tunnelId < 0) throw new DataFormatException("Invalid tunnel ID: " + _tunnelId);
+        // writeLong() will throw DFE on negative value
+        //if (_tunnelId < 0) throw new DataFormatException("Invalid tunnel ID: " + _tunnelId);
         DataHelper.writeLong(out, 4, _tunnelId);
     }