why we want to use std::remove_extent provided in c++11?

I'm studying new features provided by C++11 and I found this std::remove_extent.

Given a array type it could return new type which remove one dimension from the given type.

typedef std::remove_extent<int[24]>::type A; //A is int

However I can't find a usage for this, aside from define a new type from existing type by remove dimension from given type.

Any one could suggest why C++11 introduce this feature? Is there any benefits of using this remove_extent?