Is make_ordered_pair and make_unordered_pair needed?

[JoeLoser]

Are the function templates make_ordered_pair and make_unordered_pair needed? See https://github.com/pratzl/graph/blob/a98481233a907eb51150a359fdf3eb22b9663280/include/graph/ordered_pair.hpp#L104 and https://github.com/pratzl/graph/blob/a98481233a907eb51150a359fdf3eb22b9663280/include/graph/ordered_pair.hpp#L197

Specifically, deduction guides should alleviate the need for these function templates.