Update sensitive_button_container.js to prevent it becoming disabled when Subject line is active

app/soapbox/features/compose/containers/sensitive_button_container.js

@@ -12,7 +12,6 @@ const messages = defineMessages({
 
 const mapStateToProps = state => ({
   active: state.getIn(['compose', 'sensitive']),
-  disabled: state.getIn(['compose', 'spoiler']),
 });
 
 const mapDispatchToProps = dispatch => ({
@@ -27,13 +26,12 @@ class SensitiveButton extends React.PureComponent {
 
   static propTypes = {
     active: PropTypes.bool,
-    disabled: PropTypes.bool,
     onClick: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
   };
 
   render() {
-    const { active, disabled, onClick, intl } = this.props;
+    const { active, onClick, intl } = this.props;
 
     return (
       <div className='compose-form__sensitive-button'>
@@ -43,7 +41,6 @@ class SensitiveButton extends React.PureComponent {
             type='checkbox'
             checked={active}
             onChange={onClick}
-            disabled={disabled}
           />
 
           <span className={classNames('checkbox', { active })} />