Remove deprecated commonjs imports and exports

plugins/talk-plugin-auth/client/.babelrc

@@ -1,14 +0,0 @@
-{
-  "presets": [
-    "es2015"
-  ],
-  "plugins": [
-    "add-module-exports",
-    "transform-class-properties",
-    "transform-decorators-legacy",
-    "transform-object-assign",
-    "transform-object-rest-spread",
-    "transform-async-to-generator",
-    "transform-react-jsx"
-  ]
-}