Folium loads two versions of bootstrap #1908
Description
Describe the bug
Folium currently loads two versions of bootstrap:
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"/>
<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css"/>To Reproduce
The first Folium iframe on https://python-visualization.github.io/folium/latest/getting_started.html contains the above snippet.