Delete unused SettingsCheckbox component

app/soapbox/components/settings_checkbox.js

@@ -1,40 +0,0 @@
-import PropTypes from 'prop-types';
-import React from 'react';
-import ImmutablePropTypes from 'react-immutable-proptypes';
-import ImmutablePureComponent from 'react-immutable-pure-component';
-import { connect } from 'react-redux';
-
-import { getSettings, changeSetting } from 'soapbox/actions/settings';
-import { Checkbox } from 'soapbox/features/forms';
-
-const mapStateToProps = state => ({
-  settings: getSettings(state),
-});
-
-export default @connect(mapStateToProps)
-class SettingsCheckbox extends ImmutablePureComponent {
-
-  static propTypes = {
-    path: PropTypes.array.isRequired,
-    settings: ImmutablePropTypes.map.isRequired,
-  }
-
-  onChange = path => {
-    return e => {
-      this.props.dispatch(changeSetting(path, e.target.checked));
-    };
-  }
-
-  render() {
-    const { settings, path, ...props } = this.props;
-
-    return (
-      <Checkbox
-        checked={settings.getIn(path)}
-        onChange={this.onChange(path)}
-        {...props}
-      />
-    );
-  }
-
-}