Removed Moq from tests

PixiEditorTests/PixiEditorTests.csproj

@@ -18,7 +18,6 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.6.1" />
-    <PackageReference Include="Moq" Version="4.14.5" />
     <PackageReference Include="OpenCover" Version="4.7.922" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.2">

PixiEditorTests/UpdateModuleTests/UpdateCheckerTests.cs

@@ -1,5 +1,4 @@
-using Moq;
-using PixiEditor.UpdateModule;
+using PixiEditor.UpdateModule;
 using System;
 using System.Collections.Generic;
 using System.Net.Http;