Merge pull request #12113 from ramonlsouza/unused-var-import

bigbluebutton-html5/imports/startup/client/base.jsx

...imports/ui/components/layout/layout-manager/container.jsx

...ml5/imports/ui/components/modal/random-user/component.jsx

...mponents/presentation/presentation-uploader/component.jsx

...ton-html5/imports/ui/components/screenshare/component.jsx

...ton-html5/imports/ui/components/video-provider/service.js