Remove stackspace adapter

Author: Jelle-S

src/BackupManager/Factory/FilesystemProviderFactory.php

@@ -9,7 +9,6 @@
 use District09\BackupManager\Filesystems\FtpFilesystem;
 use District09\BackupManager\Filesystems\GcsFilesystem;
 use District09\BackupManager\Filesystems\LocalFilesystem;
-use District09\BackupManager\Filesystems\RackspaceFilesystem;
 use District09\BackupManager\Filesystems\SftpFilesystem;
 
 class FilesystemProviderFactory implements FilesystemProviderFactoryInterface
@@ -32,7 +31,6 @@ public static function create($filesystemConfig)
         $filesystemProvider->add(new DropboxFilesystem());
         $filesystemProvider->add(new FtpFilesystem());
         $filesystemProvider->add(new LocalFilesystem());
-        $filesystemProvider->add(new RackspaceFilesystem());
         $filesystemProvider->add(new SftpFilesystem());
 
         return $filesystemProvider;