message: Adjust warning message
diff: @@ -516,7 +516,6 @@ module.exports = React.createClass({
  <p>End-to-end encryption is in beta and may not be reliable.</p>
  <p>You should <b>not</b> yet trust it to secure data.</p>
  <p>Devices will <b>not</b> yet be able to decrypt history from before they joined the room.</p>
  - <p>Once encryption is enabled for a room it <b>cannot</b> be turned off again (for now).</p>
  <p>Encrypted messages will not be visible on clients that do not yet implement encryption.</p>
  </div>
  ),
  