When you say that you no longer hold the religious beliefs you did in the past, this is an example of a situation where you recant.
Origin of recantClassical Latin recantare ; from re-, back, again + cantare, frequentative of canere, to sing: see chant
verbre·cant·ed, re·cant·ing, re·cants
Origin of recantLatin recantāre : re-, re- + cantāre, to sing, frequentative of canere; see kan- in Indo-European roots.
(third-person singular simple present recants, present participle recanting, simple past and past participle recanted)