Cleanup subdermal implant code (#39755)

Content.Client/Implants/ImplanterSystem.cs

@@ -23,6 +23,8 @@ public sealed class ImplanterSystem : SharedImplanterSystem
     {
         if (_uiSystem.TryGetOpenUi<DeimplantBoundUserInterface>(uid, DeimplantUiKey.Key, out var bui))
         {
+            // TODO: Don't use protoId for deimplanting
+            // and especially not raw strings!
             Dictionary<string, string> implants = new();
             foreach (var implant in component.DeimplantWhitelist)
             {