Xamarin Forms Android project is requiring JetBrains.Annotations.PCL328. I do not have Resharper!

I created a Xamarin Forms project and when I compiled, I am getting the following error.

Exception while loading assemblies: System.IO.FileNotFoundException: Could not load assembly 'JetBrains.Annotations.PCL328, Version=8.0.5.0, Culture=neutral, PublicKeyToken=1010a0d8d6380325'. Perhaps it doesn't exist in the Mono for Android profile?
File name: 'JetBrains.Annotations.PCL328.dll'
at Xamarin.Android.Tuner.DirectoryAssemblyResolver.Resolve(AssemblyNameReference reference, ReaderParameters parameters)
at Xamarin.Android.Tasks.ResolveAssemblies.AddAssemblyReferences(ICollection`1 assemblies, AssemblyDefinition assembly, Boolean topLevel)
at Xamarin.Android.Tasks.ResolveAssemblies.Execute()

I can confirm I do not have any JetBrains products installed.