Fix the event handlers with event normalization

Events are now normalized within the responder system, so those handlers
don't need to be listed anymore. Recently added events (blur,
contextmenu, focus) are now also normalized.

Author: necolas

packages/react-native-web/src/exports/createElement/index.js

@@ -21,18 +21,12 @@ import React from 'react';
  * and remove event handlers when disabled.
  */
 const eventHandlerNames = {
+  onBlur: true,
   onClick: true,
   onClickCapture: true,
-  onMoveShouldSetResponder: true,
-  onMoveShouldSetResponderCapture: true,
-  onResponderGrant: true,
-  onResponderMove: true,
-  onResponderReject: true,
+  onContextMenu: true,
+  onFocus: true,
   onResponderRelease: true,
-  onResponderTerminate: true,
-  onResponderTerminationRequest: true,
-  onStartShouldSetResponder: true,
-  onStartShouldSetResponderCapture: true,
   onTouchCancel: true,
   onTouchCancelCapture: true,
   onTouchEnd: true,