Removed unused namespaces.

AaxDecrypter/AaxcDownloadConverter.cs

@@ -3,10 +3,7 @@ using Dinah.Core.Diagnostics;
 using Dinah.Core.IO;
 using Dinah.Core.StepRunner;
 using System;
-using System.Collections.Generic;
 using System.IO;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace AaxDecrypter
 {

FileLiberator/BackupBook.cs

@@ -1,9 +1,7 @@
 using System;
-using System.Linq;
 using System.Threading.Tasks;
 using DataLayer;
 using Dinah.Core.ErrorHandling;
-using FileLiberator;
 using FileManager;
 
 namespace FileLiberator

FileLiberator/DownloadPdf.cs

@@ -1,5 +1,4 @@
-using System;
-using System.IO;
+using System.IO;
 using System.Linq;
 using System.Net.Http;
 using System.Threading.Tasks;

FileLiberator/IProcessableExt.cs

@@ -1,5 +1,4 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using ApplicationServices;