Remove one of the two years

Error²Federal courts, Illinois courts21st and 22nd editions

A constitution no longer in effect is cited by its year of adoption, and a second year in parentheses belongs there only where the provision cited entered that constitution in a different year.¹

1. 1R. 11 Constitutions.
2. 2An error: the rule in note 1 allows one form, and this is not it.