Revert "OBT1.1.0 Merge branch 'dev_pte' into dev"

This reverts commit 177cf89756, reversing
changes made to 42ba733cd4.

Barotrauma/BarotraumaShared/SharedSource/Characters/AI/AITarget.cs

@@ -1,67 +1,13 @@
 using Microsoft.Xna.Framework;
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
 using System.Xml.Linq;
 
 namespace Barotrauma
 {
-    /// <summary>
-    /// Thread-safe wrapper for AITarget list operations.
-    /// Uses copy-on-write pattern for lock-free reads.
-    /// </summary>
-    class ThreadSafeAITargetList : IEnumerable<AITarget>
-    {
-        private volatile List<AITarget> _list = new List<AITarget>();
-        private readonly object _writeLock = new object();
-
-        public int Count => _list.Count;
-
-        public void Add(AITarget target)
-        {
-            lock (_writeLock)
-            {
-                var newList = new List<AITarget>(_list) { target };
-                Interlocked.Exchange(ref _list, newList);
-            }
-        }
-
-        public bool Remove(AITarget target)
-        {
-            lock (_writeLock)
-            {
-                var newList = new List<AITarget>(_list);
-                bool removed = newList.Remove(target);
-                if (removed)
-                {
-                    Interlocked.Exchange(ref _list, newList);
-                }
-                return removed;
-            }
-        }
-
-        public void Clear()
-        {
-            Interlocked.Exchange(ref _list, new List<AITarget>());
-        }
-
-        public bool Contains(AITarget target) => _list.Contains(target);
-
-        public AITarget this[int index] => _list[index];
-
-        public IEnumerator<AITarget> GetEnumerator() => _list.GetEnumerator();
-        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() => GetEnumerator();
-
-        public List<AITarget> ToList() => new List<AITarget>(_list);
-        public AITarget FirstOrDefault(Func<AITarget, bool> predicate) => _list.FirstOrDefault(predicate);
-        public IEnumerable<AITarget> Where(Func<AITarget, bool> predicate) => _list.Where(predicate);
-        public bool Any(Func<AITarget, bool> predicate) => _list.Any(predicate);
-    }
-
     partial class AITarget
     {
-        public static ThreadSafeAITargetList List = new ThreadSafeAITargetList();
+        public static List<AITarget> List = new List<AITarget>();
 
         private Entity entity;
         public Entity Entity