Revert "fixes a bunch of warnings"

This reverts commit d4d85b663f.

Content.Server/AI/Utility/NpcBehaviorManager.cs

@@ -28,6 +28,7 @@ namespace Content.Server.AI.Utility
     internal sealed class NpcBehaviorManager : INpcBehaviorManager
     {
         [Dependency] private readonly IDynamicTypeFactory _typeFactory = default!;
+        [Dependency] private readonly IEntityManager _entityManager = default!;
 
         private readonly NpcActionComparer _comparer = new();