Prune usings

Author: jcansdale

test/GitHub.InlineReviews.UnitTests/ViewModels/InlineCommentPeekViewModelTests.cs

@@ -7,7 +7,6 @@
 using System.Threading.Tasks;
 using GitHub.Api;
 using GitHub.Factories;
-using GitHub.InlineReviews.Commands;
 using GitHub.InlineReviews.Services;
 using GitHub.InlineReviews.ViewModels;
 using GitHub.Models;
@@ -19,7 +18,6 @@
 using Microsoft.VisualStudio.Utilities;
 using NSubstitute;
 using Octokit;
-using ReactiveUI;
 using NUnit.Framework;
 using GitHub.Commands;