Write rake task to remove outdated attributes from node files

[mabijkerk]

There are a number of attributes that are outdated. See quintel/documentation#158, but to also give examples here:

• hours_maint_nl
• hours_place_nl
• hours_prep_nl
• ...

Currently, we simply delete them whenever we encounter them. It would be more efficient however to build a rake task and remove them in one go from all node files, whenever we retire an attribute. Note: we would then preferably retire the attributes completely. Not only from node files, but also the relevant queries and the attribute itself on Atlas.

[github-actions]

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[mabijkerk]

Note: this should not be a separate Python script. It should be a formalized rake task in Ruby, that uses the functionalities from Atlas. See for example how import_node.rb uses the Atlas::EnergyNode functionality.