this was needed to make tus-js-client work in RN, it works, removing

examples/react-native-expo/tus-test.js

@@ -1,53 +0,0 @@
-import tus from 'tus-js-client'
-
-function tusUpload (blob) {
-  return new Promise((resolve, reject) => {
-    const upload = new tus.Upload(blob, {
-      endpoint: 'https://master.tus.io/files/',
-      retryDelays: [0, 1000, 3000, 5000],
-      metadata: {
-        filename: blob.name,
-        filetype: blob.type
-      },
-      onError: function (error) {
-        console.log('Failed because: ' + error)
-        reject(error)
-      },
-      onProgress: function (bytesUploaded, bytesTotal) {
-        var percentage = (bytesUploaded / bytesTotal * 100).toFixed(2)
-        console.log(bytesUploaded, bytesTotal, percentage + '%')
-      },
-      onSuccess: function () {
-        console.log('Download %s from %s', upload.file.name, upload.url)
-        resolve(upload.url)
-      }
-    })
-
-    upload.start()
-  })
-}
-
-function testUploadFileWithTus (file) {
-  return new Promise((resolve, reject) => {
-    console.log('Attempting a tus upload in React Native...')
-    console.log('with file: ', file)
-
-    const xhr = new XMLHttpRequest()
-    xhr.responseType = 'blob'
-    xhr.onload = () => {
-      console.log('LOAD', xhr.response)
-      const blob = xhr.response
-      tusUpload(blob)
-        .then(resolve)
-        .catch(reject)
-    }
-    xhr.onerror = (err) => {
-      console.log(err)
-      reject(err)
-    }
-    xhr.open('GET', file.uri)
-    xhr.send()
-  })
-}
-
-export default testUploadFileWithTus