Fix a bunch of compiler warnings (#10518)

Content.Client/Popups/PopupSystem.cs

@@ -19,7 +19,6 @@ namespace Content.Client.Popups
         [Dependency] private readonly IInputManager _inputManager = default!;
         [Dependency] private readonly IUserInterfaceManager _userInterfaceManager = default!;
         [Dependency] private readonly IEyeManager _eyeManager = default!;
-        [Dependency] private readonly IMapManager _map = default!;
         [Dependency] private readonly IPlayerManager _playerManager = default!;
         [Dependency] private readonly ExamineSystemShared _examineSystem = default!;