If someone just walked up and used the Killing Curse on Voldemort, would that destroy one of his Horcruxes? Dumbledore explains to Harry:
The seventh part of his soul, however maimed, resides inside his regenerated body.
— Half-Blood Prince, chapter 23, Horcruxes
Does that therefore mean if you were to destroy the “seventh part” of Voldemort’s soul which lies within his body, that another part of his should must release itself from whatever the object is (diary, ring, etc.) to give himself a new body, leaving one less Horcrux?