Fix a bunch of compiler warnings (#10518)

Content.Client/Singularity/Visualizers/RadiationCollectorVisualizer.cs

@@ -44,11 +44,13 @@ namespace Content.Client.Singularity.Visualizers
             }
         }
 
+        [Obsolete("Subscribe to your component being initialised instead.")]
         public override void InitializeEntity(EntityUid entity)
         {
             IoCManager.Resolve<IEntityManager>().EnsureComponent<AnimationPlayerComponent>(entity);
         }
 
+        [Obsolete("Subscribe to AppearanceChangeEvent instead.")]
         public override void OnChangeData(AppearanceComponent component)
         {
             base.OnChangeData(component);