Replace pragma warning 649 disable/restore with default!

Content.Server/GameObjects/Components/Fluids/PuddleComponent.cs

@@ -46,9 +46,7 @@ namespace Content.Server.GameObjects.Components.Fluids
         // based on behaviour (e.g. someone being punched vs slashed with a sword would have different blood sprite)
         // to check for low volumes for evaporation or whatever
 
-#pragma warning disable 649
-        [Dependency] private readonly IMapManager _mapManager;
-#pragma warning restore 649
+        [Dependency] private readonly IMapManager _mapManager = default!;
 
         public override string Name => "Puddle";