Concrete "stump" in basement?

The previous owners of my home moved a staircase that was attached to a support beam which is no longer present. As a result, the cement around where the end of the stairs were rises above the floor level in the style of a tree stump. I would like to finish the basement but I can't carpet over the stump. Any... show more The previous owners of my home moved a staircase that was attached to a support beam which is no longer present. As a result, the cement around where the end of the stairs were rises above the floor level in the style of a tree stump. I would like to finish the basement but I can't carpet over the stump. Any idea on how I can remove it without cracking my slab?
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