uppy: remove unstable `ImageEditor` export

cc @arturi

people need to import it manually for now, and it's not a dependency of
the `uppy` wrapper package

packages/uppy/index.js

@@ -42,6 +42,5 @@ exports.Form = require('@uppy/form')
 exports.GoldenRetriever = require('@uppy/golden-retriever')
 exports.ReduxDevTools = require('@uppy/redux-dev-tools')
 exports.ThumbnailGenerator = require('@uppy/thumbnail-generator')
-exports.ImageEditor = require('@uppy/image-editor')
 
 exports.locales = {}

packages/uppy/index.mjs

@@ -40,4 +40,3 @@ export { default as Form } from '@uppy/form'
 export { default as GoldenRetriever } from '@uppy/golden-retriever'
 export { default as ReduxDevTools } from '@uppy/redux-dev-tools'
 export { default as ThumbnailGenerator } from '@uppy/thumbnail-generator'
-export { default as ImageEditor } from '@uppy/image-editor'