Obsolete Logger cleanup for EntitySystems (#25941)

* Small obsolete Logger cleanup

* Fixed three EntitySystem logs that weren't doing it right.

Content.Server/Traits/TraitSystem.cs

@@ -27,7 +27,7 @@ public sealed class TraitSystem : EntitySystem
         {
             if (!_prototypeManager.TryIndex<TraitPrototype>(traitId, out var traitPrototype))
             {
-                Logger.Warning($"No trait found with ID {traitId}!");
+                Log.Warning($"No trait found with ID {traitId}!");
                 return;
             }