Is overriding a pure virtual with a pure virtual pointless?

Consider redeclaring a pure virtual member function in a derived class:

struct A
{
	virtual int Test() = 0;
};

struct B : A
{
	virtual int Test() = 0; // Can this line be safely removed?  Does it serve any purpose?
};

struct C : B
{
	virtual int Test()
	{
		return 42;
	}
};

As far as I understand, once a member function is virtual in a base class, it is virtual forever in all derived classes.

And if a class is abstract (has a pure virtual member function), then it's okay to derive from it and not implement it...it just means that you are creating another abstract class.

There doesn't seem to be a way to say anything special about B::Test or target it specifically.  It IS A::Test which, for an object of type C IS C::Test.

So I think the declaration made in B of Test is useless because it inherits from A and it's pointless to redeclare it as pure virtual ... it already is pure virtual.  Am I missing anything?  Does the declaration of Test in struct B as shown actually allow for anything different than if it were removed?  Is there a situation where it would matter?

And I'm only talking about redeclaring a pure virtual function as pure virtual again in a derived class.