Reduce verbosity of Clock component

Author: shirakaba

sample/app/testComponents/stateful.tsx

@@ -192,19 +192,6 @@ export class Clock extends React.Component<{}, { date: Date }> {
           1000
       );
     }
-
-    shouldComponentUpdate(){
-        console.log(`[Clock] shouldComponentUpdate`);
-        return true;
-    }
-
-    componentWillUpdate(){
-        console.log(`[Clock] componentWillUpdate`);
-    }
-
-    componentDidUpdate(){
-        console.log(`[Clock] componentDidUpdate`);
-    }
 
     componentWillUnmount() {
         clearInterval(this.timerID);
@@ -217,7 +204,6 @@ export class Clock extends React.Component<{}, { date: Date }> {
     }
 
     render() {
-        console.log(`[Clock] render()!`);
 
         return React.createElement(
             "textView",