Prayer of Azariah. Why was it removed from the Bible?

This is the Prayer of Azariah
3 Hebrew men were thrown into a fiery furnace by Nebuchadnezzar II, The King of Babylon for refusing to bow to the king's image.
Azariah's name was changed by the Chaldeans to Abednego. Hananiah's was changed to Shadrach and Mishael was changed to Meshach
This is the Prayer, Repentance, and Praise of Azariah that was removed from the Bible.
Does anyone know why?