Fix uploading files to Twitter when they originate from an S3 bucket

abraham-twitteroauth-fix-twitter-upload.patch

diff --git a/src/TwitterOAuth.php b/src/TwitterOAuth.php
index 37114c5..4988dbb 100644
--- a/src/TwitterOAuth.php
+++ b/src/TwitterOAuth.php
@@ -330,21 +330,20 @@ class TwitterOAuth extends Config
      * Private method to upload media (not chunked) to upload.twitter.com.
      *
      * @param string $path
      * @param array  $parameters
      *
      * @return array|object
      */
     private function uploadMediaNotChunked(string $path, array $parameters)
     {
         if (
-            !is_readable($parameters['media']) ||
             ($file = file_get_contents($parameters['media'])) === false
         ) {
             throw new \InvalidArgumentException(
                 'You must supply a readable file',
             );
         }
         $parameters['media'] = base64_encode($file);
         return $this->http(
             'POST',
             self::UPLOAD_HOST,