message: replace DatePicker div wrapper with Fragment, remove withStyles HOC
diff: -import React, { PureComponent } from 'react';
  +import React, { PureComponent, Fragment } from 'react';
  import PropTypes from 'prop-types';
  import moment from 'moment';
  -import { withStyles } from 'material-ui';
  import Calendar from './Calendar';
  import YearSelection from './YearSelection';
  @@ -15,7 +14,6 @@ export class DatePicker extends PureComponent {
  date: PropTypes.object.isRequired,
  minDate: DomainPropTypes.date,
  maxDate: DomainPropTypes.date,
  - classes: PropTypes.object.isRequired,
  onChange: PropTypes.func.isRequired,
  disablePast: PropTypes.bool,
  disableFuture: PropTypes.bool,
  @@ -76,7 +74,6 @@ export class DatePicker extends PureComponent {
  render() {
  const {
  - classes,
  disablePast,
  disableFuture,
  onChange,
  @@ -90,7 +87,7 @@ export class DatePicker extends PureComponent {
  const { showYearSelection } = this.state;
  return (
  - <div className={classes.container}>
  + <Fragment>
  <PickerToolbar>
  <ToolbarButton
  type="subheading"
  @@ -137,14 +134,10 @@ export class DatePicker extends PureComponent {
  shouldDisableDate={shouldDisableDate}
  />
  }
  - </div>
  + </Fragment>
  );
  }
  }
  -const styles = () => ({
  -
  -});
  -
  -export default withStyles(styles, { name: 'MuiPickersDatePicker' })(DatePicker);
  +export default DatePicker;
  