Revert "Disease stages" (#9034)

Content.Server/Disease/Effects/DiseaseAddComp.cs

@@ -1,22 +0,0 @@
-using Content.Shared.Disease;
-using JetBrains.Annotations;
-
-namespace Content.Server.Disease.Effects;
-
-[UsedImplicitly]
-public sealed class DiseaseAddComp : DiseaseEffect
-{
-    [DataField("comp")]
-    public string? Comp = null;
-    public override void Effect(DiseaseEffectArgs args)
-    {
-        if (Comp == null) return;
-
-        EntityUid uid = args.DiseasedEntity;
-        Component newComponent = (Component) IoCManager.Resolve<IComponentFactory>().GetComponent(Comp);
-        newComponent.Owner = uid;
-
-        if (!args.EntityManager.HasComponent(uid, newComponent.GetType()))
-            args.EntityManager.AddComponent(uid, newComponent);
-    }
-}