Cleanly remove bower from an ASP.Net 5 project

I'm using the ASP.Net 5 RC, but I don't want to use bower, I want to use NPM to manage all of my dependencies.

I have removed bower.json, removed the bower install command from project.json and specifically removed each package using bower uninstall.

However, it stil shows up in the solution explorer:

Is there any way to properly remove it, or is this just the way ASP.Net 5 is supposed to be used?

Thanks

Turns out, the key is to remove the DnxInvisibleContent tag inside ItemGroup in the xproj file.

My ItemGroup section now looks like this:

<ItemGroup>
    <DnxInvisibleContent Include=".bowerrc" />
    <DnxInvisibleContent Include="package.json" />
</ItemGroup>