message: fix(explore): clear custom label if removed
diff: @@ -62,7 +62,6 @@ export default class AdhocMetricEditPopoverTitle extends React.Component {
  onInputBlur(e) {
  if (e.target.value === '') {
  - e.target.value = this.props.defaultLabel;
  this.props.onChange(e);
  }
  this.onBlur();
  