[Flow] Fix or suppress last minute errors for 0.12.0

Examples/UIExplorer/MapViewExample.js

@@ -159,9 +159,6 @@ var MapViewExample = React.createClass({
   render() {
     return (
       <View>
-        {/* $FlowIssue #7363964 - There's a bug in Flow where you cannot
-          * omit a property or set it to undefined if it's inside a shape,
-          * even if it isn't required */}
         <MapView
           style={styles.map}
           onRegionChange={this._onRegionChange}