uppy-base: Remove obsolete entry point

src/uppy-base/src/index.js

@@ -1,11 +0,0 @@
-const Multipart = require('./plugins/Multipart')
-const Provider = require('./plugins/Provider')
-const Tus10 = require('./plugins/Tus10')
-const Webcam = require('./plugins/Webcam')
-
-module.exports = {
-  Multipart,
-  Provider,
-  Tus10,
-  Webcam
-}