ArgumentException: The Assembly UnityEditor is referenced by UniRx.Asyncというエラーの対処法

前提・実現したいこと

unity初心者です。
oculusでwebViewを表示させたく、[UnityOculusAndroidVRBrowser]というリポジトリを用いて実現しようとしています。(https://github.com/IanPhilips/UnityOculusAndroidVRBrowser)

OculusSDKがコンフリクトしていたので修正し、ビルドを試みました。

発生している問題・エラーメッセージ

ArgumentException: The Assembly UnityEditor is referenced by UniRx.Async ('Assets/UnityOculusAndroidVRBrowser-master/UnityProject/obj/Debug/UniRx.Async.dll'). But the dll is not allowed to be included or could not be found.
UnityEditor.AssemblyHelper.AddReferencedAssembliesRecurse (System.String assemblyPath, System.Collections.Generic.List1[T] alreadyFoundAssemblies, System.String[] allAssemblyPaths, System.String[] foldersToSearch, System.Collections.Generic.Dictionary2[TKey,TValue] cache, UnityEditor.BuildTarget target) (at /Users/bokken/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:154)
UnityEditor.AssemblyHelper.FindAssembliesReferencedBy (System.String[] paths, System.String[] foldersToSearch, UnityEditor.BuildTarget target) (at /Users/bokken/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:194)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:197)