Remove JavaScript example for fixed timezone

  new java.util.Date(1000 * Long.parseLong(System.getenv("SOURCE_DATE_EPOCH")))

```

### Javascript / Node.js

### JavaScript / Node.js

```javascript

const epoch = Number(process.env["SOURCE_DATE_EPOCH"]);

const timestamp = Number.isInteger(epoch) ? new Date(epoch * 1000) : new Date();

// Alternatively, to ensure a fixed timezone:

const epoch = Number(process.env["SOURCE_DATE_EPOCH"]);

var timestamp = new Date();

if (Number.isInteger(epoch)) {

    timestamp = new Date((epoch * 1000) + (timestamp.getTimezoneOffset() * 60000));

}

```

### Coffeescript