Merge pull request #2081 from jitsi/clean_deps

chore(deps): remove unused.

package.json

     "@atlaskit/tabs": "2.0.0",
     "@atlaskit/toggle": "2.0.4",
     "@atlassian/aui": "6.0.6",
-    "async": "0.9.0",
     "autosize": "1.18.13",
-    "bootstrap": "3.1.1",
     "es6-iterator": "2.0.1",
     "es6-symbol": "3.1.1",
     "i18next": "8.4.3",
     "react-redux": "5.0.6",
     "redux": "3.7.2",
     "redux-thunk": "2.2.0",
-    "retry": "0.6.1",
     "strophe": "1.2.4",
     "strophejs-plugins": "0.0.7",
     "styled-components": "1.3.0",