Don't clean slashes from folder names

(cherry picked from commit 0bc16efe26d403ab89b8fdb092fe729cd4ec2d7b)

src/NzbDrone.Core/Organizer/FileNameBuilder.cs

@@ -250,9 +250,8 @@ namespace NzbDrone.Core.Organizer
         public static string CleanFolderName(string name)
         {
             name = FileNameCleanupRegex.Replace(name, match => match.Captures[0].Value[0].ToString());
-            name = name.Trim(' ', '.');
 
-            return CleanFileName(name);
+            return name.Trim(' ', '.');
         }
 
         private void AddArtistTokens(Dictionary<string, Func<TokenMatch, string>> tokenHandlers, Artist artist)