Removed some private unused fields

prs.classes/Schedule.cs

@@ -119,14 +119,6 @@ namespace Comal.Classes
     [UserTracking("Task Scheduler")]
     public class Schedule : Entity, IPersistent, IRemotable, IOneToMany<Employee>, ILicense<ScheduleEngineLicense>
     {
-        #region Private Fields
-
-        private DateTime _EndDate = DateTime.MinValue;
-
-        private uint _Iterations = 0;
-
-        #endregion
-
         #region Public Properties
 
         [NullEditor]
@@ -134,7 +126,7 @@ namespace Comal.Classes
 
         //[NullEditor]
         //[DoNotSerialize]
-        public Type DocumentType()
+        public Type? DocumentType()
         {
             try
             {