cleaned up imports in relaxation.py
cleaned up imports in relaxation.py


pyamg/pyamg,huahbo/pyamg,huahbo/pyamg,huahbo/pyamg,kidaa/pyamg,kidaa/pyamg,pyamg/pyamg,kidaa/pyamg,kidaa/pyamg,pyamg/pyamg,huahbo/pyamg