remove old Tus10 and RestoreFiles

src/plugins/RestoreFiles/index.js

@@ -1,5 +0,0 @@
-const GoldenRetriever = require('../GoldenRetriever')
-
-console.warn('Using `uppy/lib/plugins/RestoreFiles` is deprecated and will be removed in v0.22. Please use `uppy/lib/plugins/GoldenRetriever` instead.')
-
-module.exports = GoldenRetriever

src/plugins/Tus10.js

@@ -1,5 +0,0 @@
-const Tus = require('./Tus')
-
-console.warn('Using `uppy/lib/plugins/Tus10` is deprecated and will be removed in v0.22. Please use `uppy/lib/plugins/Tus` instead.')
-
-module.exports = Tus