Pole Retaining Wall How Can I Knock Down A Small Half Wall In The Entryway With Poles?

How can I knock down a small half wall in the entryway with poles? - pole retaining wall

At the entrance is 4 cm high x 4 "wall and half the width of the platform (located on the entire wall projects) with 4 wooden poles that run from the platform on the ceiling. How can it be reversed? Is current a problem? Is that a retaining wall of the poles? "We want to destroy the ceiling or in a hole ...