Remove unused using directive

Author: JesperSchulz

Apps/W1/HybridSL/app/src/codeunits/SLFiscalPeriods.Codeunit.al

@@ -5,7 +5,6 @@
 
 namespace Microsoft.DataMigration.SL;
 
-using Microsoft.DataMigration;
 using Microsoft.Foundation.Period;
 using Microsoft.Inventory.Setup;
 using System.Integration;