Help! OVRPlugin.dll is colliding with another plugin when building for iOS

Today I upgraded from Unity 5.5.1 to 5.5.2 and when building for iOS, there's an error that does not allow the build to continue:

Plugin 'OVRPlugin.dll' is used from several locations:
/Applications/Unity/Unity.app/Contents/UnityExtensions/Unity/VR/Win64/OVRPlugin.dll would be copied to <PluginPath>/OVRPlugin.dll
/Applications/Unity/Unity.app/Contents/UnityExtensions/Unity/VR/Win/OVRPlugin.dll would be copied to <PluginPath>/OVRPlugin.dll
Please fix plugin settings and try again.

UnityEditor.Modules.DefaultPluginImporterExtension:CheckFileCollisions(String)
UnityEditorInternal.PluginsHelper:CheckFileCollisions(BuildTarget) (at /Users/builduser/buildslave/unity/build/Editor/Mono/Plugins/PluginsHelper.cs:25)
UnityEditor.HostView:OnGUI()​

I don't use VR in my project. For iOS, there's no setting in Other Settings for "Virtual Reality Supported" - just the Android Player Settings has that.

How can I disable these plugins? I don't see them in my Assets folder or anything.

Thanks,
George

 

Nevermind, I did Reimport All and this error is no longer showing.