Since the Quran, and even the hadiths (which is totally wrong since hadiths are the words of Muhammad and not of Allah), are abrogating whatever they see fit to change in the Words of God, like for instance the teaching of Jesus about loving our enemies, why did Allah still let the abrogated verses in the Quran? Those should not be legit anymore since there are other verses to correct them.
But whatever. Muslims must learn by heart the Quran, even the deprecated verses. What's the point in learning something deprecated?