Bower package and bootstrap as dependencies. How to destroy?

Question

bower

There is a bower package, in the bootstrap package a component: .less and .css versions.
Bootstrap is necessary for the component to work correctly, but I faced a problem - what if a person connects bootstrap not through bower, but through CDN or NPM? How do they proceed in such a case?
At the moment, I have removed bootstrap from dependencies, and in Readme.md I write that Bootstrap needs to be included manually in any convenient way.
Or is it better to leave bootstrap as a dependency, let it be downloaded, let alone hack bootstrap from another place or from /bower_components - let the user decide?