Fix ColorPicker.Models version mismatch by removing ColorPicker.Models refernce

src/PixiEditor/PixiEditor.csproj

@@ -100,7 +100,6 @@
     <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.9.2"/>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.9.2"/>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3"/>
-    <PackageReference Include="PixiEditor.ColorPicker.Models" Version="1.0.5"/>
     <PackageReference Include="PixiEditor.ColorPicker.AvaloniaUI" Version="1.0.6"/>
   </ItemGroup>