removed slice feature from page and tutorial

Author: jasnoo

src/app/components/Tutorial.tsx

@@ -134,13 +134,6 @@ export default class Tutorial extends React.Component<tutorialProps, tutorialSta
               "<ul><li>Use button to lock Reactime to the target application's tab in the Chrome Browser</li></ul>",
             position: 'top',
           },
-          {
-            title: 'Split Button',
-            element: '.split-button',
-            intro:
-              '<ul> <li>Use button to split Reactime into two windows in order to view multiple tabs simultaneously</li> </ul>',
-            position: 'top',
-          },
           {
             title: 'Download Button',
             element: '.export-button',

src/app/containers/ButtonsContainer.tsx

@@ -65,12 +65,6 @@ function ButtonsContainer(): JSX.Element {
         {paused ? <FontAwesomeIcon icon={faUnlock} /> : <FontAwesomeIcon icon={faLock} />}
         {paused ? 'Unlock' : 'Lock'}
       </button>
-
-      <button className='split-button' type='button' onClick={() => dispatch(toggleSplit())}>
-        {split ? <FontAwesomeIcon icon={faSquare} /> : <FontAwesomeIcon icon={faColumns} />}
-        {split ? 'Unsplit' : 'Split'}
-      </button>
-
       <button className='export-button' type='button' onClick={() => exportHandler(snapshots)}>
         <FontAwesomeIcon icon={faDownload} />
         Download