Use expression body syntax

OpenRA.Mods.Common/Warheads/Warhead.cs

@@ -43,7 +43,7 @@ namespace OpenRA.Mods.Common.Warheads
 		[Desc("Delay in ticks before applying the warhead effect.", "0 = instant (old model).")]
 		public readonly int Delay = 0;
 
-		int IWarhead.Delay { get { return Delay; } }
+		int IWarhead.Delay => Delay;
 
 		[Desc("The color used for this warhead's visualization in the world's `WarheadDebugOverlay` trait.")]
 		public readonly Color DebugOverlayColor = Color.Red;