Revert "Mind ecs" (#14881)

Content.Server/Mind/Components/MindComponent.cs

@@ -1,13 +1,10 @@
-using System.Diagnostics.CodeAnalysis;
-using YamlDotNet.Core.Tokens;
-
 namespace Content.Server.Mind.Components
 {
     /// <summary>
     ///     Stores a <see cref="Server.Mind.Mind"/> on a mob.
     /// </summary>
     [RegisterComponent, Access(typeof(MindSystem))]
-    public sealed class MindContainerComponent : Component
+    public sealed class MindComponent : Component
     {
         /// <summary>
         ///     The mind controlling this mob. Can be null.
@@ -20,7 +17,6 @@ namespace Content.Server.Mind.Components
         ///     True if we have a mind, false otherwise.
         /// </summary>
         [ViewVariables]
-        [MemberNotNullWhen(true, nameof(Mind))]
         public bool HasMind => Mind != null;
 
         /// <summary>

Content.Server/Mind/Components/VisitingMindComponent.cs

@@ -3,8 +3,14 @@ namespace Content.Server.Mind.Components
     [RegisterComponent]
     public sealed class VisitingMindComponent : Component
     {
-        [ViewVariables]
-        public Mind Mind { get; set; } = default!;
+        [ViewVariables] public Mind Mind { get; set; } = default!;
+
+        protected override void OnRemove()
+        {
+            base.OnRemove();
+
+            Mind?.UnVisit();
+        }
     }
 
     public sealed class MindUnvisitedMessage : EntityEventArgs