C# 9 Cleanup (#325)

- [X] Removes EventArgs - not needed
- [X] Merges sequential checks
- [X] Removes redundant type declarations

Projects/UOContent/Engines/Harvest/Core/HarvestDefinition.cs

@@ -79,7 +79,7 @@ namespace Server.Engines.Harvest
         public uint VeinWeights { get; private set; }
 
         public Dictionary<Map, Dictionary<Point2D, HarvestBank>> Banks { get; }
-            = new Dictionary<Map, Dictionary<Point2D, HarvestBank>>();
+            = new();
 
         public void SendMessageTo(Mobile from, TextDefinition message)
         {