Remove usages of bootstrap

Signed-off-by: Joas Schilling <coding@schilljs.com>

core/src/globals.js

@@ -37,7 +37,6 @@ import 'jquery-ui-dist/jquery-ui.theme.css'
 // END TODO
 import autosize from 'autosize'
 import Backbone from 'backbone'
-import 'bootstrap/js/dist/tooltip'
 import './Polyfill/tooltip'
 import ClipboardJS from 'clipboard'
 import { dav } from 'davclient.js'

core/src/install.js

@@ -33,7 +33,6 @@ import 'jquery-ui/ui/widgets/button'
 import 'jquery-ui/themes/base/theme.css'
 import 'jquery-ui/themes/base/button.css'
 
-import 'bootstrap/js/dist/tooltip'
 import './Polyfill/tooltip'
 
 import 'strengthify'