tech: removed test component

public/app/core/components/CoolButton.tsx

-
-import * as React from 'react';
-import * as ReactDOM from 'react-dom';
-import coreModule from '../core_module';
-
-export interface ICoolButtonProps {
-  count: number;
-}
-
-export interface ICoolButtonState {
-  count: number;
-}
-
-
-export class CoolButton extends React.Component<ICoolButtonProps, ICoolButtonState> {
-
-  constructor(props) {
-    super(props);
-
-    this.state = {count: 1};
-  }
-
-  onClick() {
-    this.setState(prevState => ({
-      count: prevState.count + 1
-    }));
-    console.log(this.state.count);
-  }
-
-  render() {
-    return (
-      <div>
-        <h2 onClick={this.onClick.bind(this)}>Hello</h2>
-        <div>{this.state.count}</div>
-        <a href="/alerting">Go to alerting</a>
-      </div>
-    );
-  }
-}
-
-export interface Props {
-  fname: string;
-  onClick: () => void;
-}
-
-function SecondButton({fname, onClick}: Props) {
-  return (
-    <div className="hello">
-      <div className="greeting">
-        Hello {fname}
-      </div>
-      <div>
-        <button onClick={onClick}>button</button>
-      </div>
-    </div>
-  );
-}
-
-coreModule.directive('coolButton', function(reactDirective) {
-  return reactDirective(CoolButton);
-});
-
-coreModule.directive('secondButton', function(reactDirective) {
-  return reactDirective(SecondButton, [
-    ['fname', {watchDepth: 'value'}]
-  ]);
-});