Zap unused local acpi_attached variable, since it has been superseded by acpi_hasprocfvs.
Zap unused local acpi_attached variable, since it has been superseded
by acpi_hasprocfvs.

ok gwk

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars