tests: do not mark `test_unsupported_hashes` as xfailed (#4777)
tests: do not mark `test_unsupported_hashes` as xfailed (#4777)

The test got fixed by f1d0939d.
xavfernandez/pip,rouge8/pip,RonnyPfannschmidt/pip,pfmoore/pip,zvezdan/pip,pradyunsg/pip,techtonik/pip,pypa/pip,sbidoul/pip,zvezdan/pip,pypa/pip,RonnyPfannschmidt/pip,techtonik/pip,rouge8/pip,pfmoore/pip,sbidoul/pip,pradyunsg/pip,xavfernandez/pip,techtonik/pip,RonnyPfannschmidt/pip,zvezdan/pip,rouge8/pip,xavfernandez/pip