Fix code analysis warnings.

NWN.Anvil/src/main/API/Color.cs

@@ -1,6 +1,5 @@
 using System;
 using Newtonsoft.Json;
-using NWN.Native.API;
 using NWNX.NET.Native;
 
 namespace Anvil.API

NWN.Anvil/src/main/API/EngineStructures/EngineStructure.cs

@@ -1,5 +1,4 @@
 using System;
-using NWN.Core;
 using NWNX.NET;
 
 namespace Anvil.API

NWN.Anvil/src/main/API/Extensions/IntegerExtensions.cs

@@ -1,6 +1,5 @@
 using System;
 using Anvil.Internal;
-using Anvil.Native;
 using NWN.Core;
 using NWN.Native.API;
 

NWN.Anvil/src/main/API/Objects/NwModule.cs

@@ -3,7 +3,6 @@
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using Anvil.Internal;
-using Anvil.Native;
 using NWN.Core;
 using NWN.Native.API;
 
@@ -131,7 +130,7 @@ public int MaxHenchmen
     /// <summary>
     /// Gets the current player count.
     /// </summary>
-    public int PlayerCount => LowLevel.ServerExoApp.m_pcExoAppInternal.m_lstPlayerList.Count();
+    public int PlayerCount => LowLevel.ServerExoApp.m_pcExoAppInternal.m_lstPlayerList.Count;
 
     /// <summary>
     /// Gets all current online players.

NWN.Anvil/src/main/API/Ruleset/NwBaseItem.cs

@@ -190,7 +190,7 @@ internal NwBaseItem(uint baseItemId, CNWBaseItem baseItemInfo)
     /// Gets the ResRef of the item's model, or the base part of the resref.<br/>
     /// This property is dependent on <see cref="ModelType"/>. See https://nwn.wiki/display/NWN1/baseitems.2da for more info.
     /// </summary>
-    public unsafe string? ItemClass
+    public string ItemClass
     {
       get
       {

NWN.Anvil/src/main/Services/Core/EncodingService.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Text;
 using Anvil.Internal;
-using NWN.Core;
 using NWNX.NET.Native;
 
 namespace Anvil.Services