Remove useless null parameter passed

Author: alex-kulakov

Extensions/Xtensive.Orm.BulkOperations/Internals/SetOperation.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
@@ -140,7 +140,7 @@ private void AddConstantValue(AddValueContext addContext)
     {
       SqlTableColumn column = SqlDml.TableColumn(addContext.Statement.Table, addContext.Field.Column.Name);
       SqlExpression value;
-      object constant = FastExpression.Lambda(addContext.Lambda.Body, null).Compile().DynamicInvoke();
+      object constant = FastExpression.Lambda(addContext.Lambda.Body).Compile().DynamicInvoke();
       if (constant==null)
         value = SqlDml.Null;
       else {