Fix usages of ReactComponentWithPureRenderMixin

Summary: Closes https://github.com/facebook/react-native/pull/13111

Differential Revision: D4761971

Pulled By: davidaurelio

fbshipit-source-id: 668dcc58e8e1b075ee760233abc6904beede9218

Libraries/CustomComponents/NavigationExperimental/NavigationHeader.js

@@ -37,7 +37,6 @@ const NavigationHeaderStyleInterpolator = require('NavigationHeaderStyleInterpol
 const NavigationHeaderTitle = require('NavigationHeaderTitle');
 const NavigationPropTypes = require('NavigationPropTypes');
 const React = require('React');
-const ReactComponentWithPureRenderMixin = require('react/lib/ReactComponentWithPureRenderMixin');
 const ReactNative = require('react-native');
 const TVEventHandler = require('TVEventHandler');
 
@@ -82,7 +81,7 @@ const APPBAR_HEIGHT = Platform.OS === 'ios' ? 44 : 56;
 const STATUSBAR_HEIGHT = Platform.OS === 'ios' ? 20 : 0;
 const {PropTypes} = React;
 
-class NavigationHeader extends React.Component<DefaultProps, Props, any> {
+class NavigationHeader extends React.PureComponent<DefaultProps, Props, any> {
   props: Props;
 
   static defaultProps = {
@@ -121,14 +120,6 @@ class NavigationHeader extends React.Component<DefaultProps, Props, any> {
     viewProps: PropTypes.shape(View.propTypes),
   };
 
-  shouldComponentUpdate(nextProps: Props, nextState: any): boolean {
-    return ReactComponentWithPureRenderMixin.shouldComponentUpdate.call(
-      this,
-      nextProps,
-      nextState
-    );
-  }
-
   _tvEventHandler: TVEventHandler;
 
   componentDidMount(): void {