Update global style

src/App.js

@@ -8,7 +8,7 @@ class App extends Component {
     return (
       <div className="App">
         <div
-          className="App-header title"
+          className="App-header"
         >
           tomadoro
         </div>

src/index.css

@@ -1,14 +0,0 @@
-body {
-  margin: 0;
-  padding: 0;
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
-    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
-    sans-serif;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-code {
-  font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
-    monospace;
-}

src/index.js

@@ -1,6 +1,5 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
-import './index.css';
 import 'bootstrap/dist/css/bootstrap.min.css';
 import App from './App';
 import * as serviceWorker from './serviceWorker';