Fix some build warnings (#6832)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Server/Botany/Systems/BotanySystem.Plant.cs

@@ -19,7 +19,6 @@ namespace Content.Server.Botany.Systems
         [Dependency] private readonly PopupSystem _popupSystem = default!;
         [Dependency] private readonly IRobustRandom _robustRandom = default!;
         [Dependency] private readonly SolutionContainerSystem _solutionContainerSystem = default!;
-        [Dependency] private readonly TagSystem _tags = default!;
 
         private int _nextUid = 0;
         private float _timer = 0f;