LegislativeClassHelper: Removed the nullable attribute.

VectoCommon/VectoCommon/Models/LegislativeClass.cs

@@ -41,14 +41,8 @@ namespace TUGraz.VectoCommon.Models
 
 	public static class LegislativeClassHelper
 	{
-		public static string GetLabel(this LegislativeClass? self)
-		{
-			return self.ToString();
-		}
+		public static string GetLabel(this LegislativeClass self) => self.ToString();
 
-		public static string ToXMLFormat(this LegislativeClass? self)
-		{
-			return self.ToString();
-		}
+		public static string ToXMLFormat(this LegislativeClass? self) => self.ToString();
 	}
 }
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