Slight cleanup, do some TODOs

PkmnLib.Dynamic/Libraries/DataLoaders/ItemDataLoader.cs

@@ -1,6 +1,5 @@
 using System.Collections.Immutable;
 using System.Text.Json;
-using JetBrains.Annotations;
 using PkmnLib.Dynamic.Libraries.DataLoaders.Models;
 using PkmnLib.Static;
 using PkmnLib.Static.Libraries;

PkmnLib.Dynamic/Libraries/DataLoaders/MoveDataLoader.cs

@@ -1,6 +1,5 @@
 using System.Collections.Immutable;
 using System.Text.Json;
-using JetBrains.Annotations;
 using PkmnLib.Dynamic.Libraries.DataLoaders.Models;
 using PkmnLib.Static;
 using PkmnLib.Static.Libraries;

PkmnLib.Dynamic/Libraries/DataLoaders/SpeciesDataLoader.cs

@@ -1,7 +1,6 @@
 using System.Collections.Immutable;
 using System.Text.Json;
 using System.Text.Json.Nodes;
-using JetBrains.Annotations;
 using PkmnLib.Dynamic.Libraries.DataLoaders.Models;
 using PkmnLib.Static;
 using PkmnLib.Static.Libraries;