Bees Nest Legal Situation

You may find this reference from SF of some help:

You are quite right to be concerned about the safety of bees. A local beekeeper might be willing to help remove them safely and your local mairie can probably advise you in that regard.
Are you certain they are bees and not frelon asiatique which will be of much concern to the mairie where there are special arrangements often in place to remove them.