Eradicate ☠ Mono ☠

Co-Authored-By: Gustas <37534529+punkpun@users.noreply.github.com>

OpenRA.Mods.Common/Orders/UnitOrderGenerator.cs

@@ -159,15 +159,8 @@ namespace OpenRA.Mods.Common.Orders
 			if (mi.Modifiers.HasModifier(Modifiers.Alt))
 				modifiers |= TargetModifiers.ForceMove;
 
-			// The Select(x => x) is required to work around an issue on mono 5.0
-			// where calling OrderBy* on SelectManySingleSelectorIterator can in some
-			// circumstances (which we were unable to identify) replace entries in the
-			// enumeration with duplicates of other entries.
-			// Other action that replace the SelectManySingleSelectorIterator with a
-			// different enumerator type (e.g. .Where(true) or .ToList()) also work.
 			var orders = self.TraitsImplementing<IIssueOrder>()
 				.SelectMany(trait => trait.Orders.Select(x => new { Trait = trait, Order = x }))
-				.Select(x => x)
 				.OrderByDescending(x => x.Order.OrderPriority)
 				.ToList();