message: Remove validation demo code
  This is example code from work in
  We're not ready to
  actually apply validation yet, so removing this for now.
diff: @@ -90,15 +90,6 @@ export default class ServerConfig extends React.PureComponent {
  this.setState({ hsUrl });
  }
  - onHomeserverValidate = (value) => {
  - try {
  - new URL(value);
  - return { valid: true, feedback: <div>Valid URL!</div> };
  - } catch (_) {
  - return { valid: false, feedback: <div>Invalid URL!</div>};
  - }
  - }
  -
  onIdentityServerBlur = (ev) => {
  this._isTimeoutId = this._waitThenInvoke(this._isTimeoutId, () => {
  this.props.onServerConfigChange({
  @@ -143,7 +134,6 @@ export default class ServerConfig extends React.PureComponent {
  value={this.state.hsUrl}
  onBlur={this.onHomeserverBlur}
  onChange={this.onHomeserverChange}
  - onValidate={this.onHomeserverValidate}
  />
  <Field id="mx_ServerConfig_isUrl"
  label={_t("Identity Server URL")}
  