Laws fallen into desuetude.
An example of desuetude is the law concerning prohibition of alcohol which is no longer in use because it was repealed.
Origin of desuetude
- French désuétude from Latin dēsuētūdō from dēsuētus past participle of dēsuēscere to put out of use dē- de- suēscere to become accustomed s(w)e- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition