Fix crash in release mode.

Fix for xgfe#235

Author: Boris Tacyniak

datepicker.js

@@ -50,14 +50,6 @@ class DatePicker extends Component {
     this.setModalVisible = this.setModalVisible.bind(this);
   }
 
-  componentWillMount() {
-    // ignore the warning of Failed propType for date of DatePickerIOS, will remove after being fixed by official
-    if (!console.ignoredYellowBox) {
-      console.ignoredYellowBox = [];
-    }
-    console.ignoredYellowBox.push('Warning: Failed propType');
-  }
-
   componentWillReceiveProps(nextProps) {
     if (nextProps.date !== this.props.date) {
       this.setState({date: this.getDate(nextProps.date)});