Here "them" refers to the names of the enemies. This can be stated in active form. AT: "Wipe out their names in" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-activepassive]])
It is inferred that "let them" is understood. This can be stated in active form. AT: "do not write down their names" (See: [[rc://en/ta/man/translate/figs-ellipsis]] and [[rc://en/ta/man/translate/figs-activepassive]])