Good Day, Apologetic
Luther never removed the Apocryphs from the scripture. The OT was the jewish cannon and had been established way before Luther.
Hebrew OT- Josephus
"Our books, those which are justly accredited, are but two and twenty, and contain the record of all time. Of these, five are the books of Moses. . . . The prophets subsequent to Moses wrote the history of the events of their own times in thirteen books [Joshua, Judges-Ruth, Samuel, Kings, Isaiah, Jeremiah-Lamentations, Ezekiel, the twelve minor prophets considered as one, Job, Daniel, Ezra-Nehemiah [considered as one], Chronicles, Esther]. The remaining four books contain hymns to God and precepts for the conduct of human life [Psalm, Proverbs, Ecclesiastes, Song of Songs]. [As for the apocryphal books] From Artaxerxes to our own time the complete history has been written but has not been deemed worthy of equal credit with the earlier records, because of the failure of the exact succession of the prophets. We have given practical proof of our reverence for our own Scriptures. For, although such long ages have now passed, no one has ventured either to add, or to remove, or to alter a syllable. And it is the instinct with every Jew, from the day of his birth, to regard them as the decrees of God. [Against Apion 1:37-42]"
There are some ECF whom compile a list of OT books and the Apocrpha is left from thier lists as well.
Peace to u,
BBAS