Remove some warnings (#5391)

* Remove unused Dependency fields

* Remove noop null check

Content.Server/Electrocution/ElectrocutionSystem.cs

@@ -39,7 +39,6 @@ namespace Content.Server.Electrocution
         [Dependency] private readonly IEntityLookup _entityLookup = default!;
         [Dependency] private readonly IRobustRandom _random = default!;
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
-        [Dependency] private readonly IConsoleHost _consoleHost = default!;
         [Dependency] private readonly StatusEffectsSystem _statusEffectsSystem = default!;
         [Dependency] private readonly SharedJitteringSystem _jitteringSystem = default!;
         [Dependency] private readonly SharedStunSystem _stunSystem = default!;