Fix IDE0028, IDE0300, IDE0301, IDE0302, IDE0303, IDE0304.

Silence IDE0305.

OpenRA.Mods.Common/Traits/ActorSpawner.cs

@@ -17,7 +17,7 @@ namespace OpenRA.Mods.Common.Traits
 	public class ActorSpawnerInfo : ConditionalTraitInfo
 	{
 		[Desc("Type of ActorSpawner with which it connects.")]
-		public readonly HashSet<string> Types = new();
+		public readonly HashSet<string> Types = [];
 
 		public override object Create(ActorInitializer init) { return new ActorSpawner(this); }
 	}