Remove some obsoleted transform methods/properties (#13457)

Content.Server/Salvage/SalvageSystem.cs

@@ -233,7 +233,6 @@ namespace Content.Server.Salvage
                 return;
             }
 
-            var parentTransform = salvageTransform.Parent!;
             foreach (var player in Filter.Empty().AddInGrid(salvageTransform.GridUid.Value, EntityManager).Recipients)
             {
                 if (player.AttachedEntity.HasValue)
@@ -244,7 +243,7 @@ namespace Content.Server.Salvage
                         // Salvage mobs are NEVER immune (even if they're from a different salvage, they shouldn't be here)
                         continue;
                     }
-                    Transform(playerEntityUid).AttachParent(parentTransform);
+                    Transform(playerEntityUid).AttachParent(salvageTransform.ParentUid);
                 }
             }