Revert "Quarantine Thread#value spec using Thread#kill."
Revert "Quarantine Thread#value spec using Thread#kill."

This reverts commit b903c1f1989233f95d1d329eef53cd30a266ad91.

See cfd672a5373e2e16a97b43f01692fe28c8a9043a

jsyeo/rubinius,kachick/rubinius,kachick/rubinius,kachick/rubinius,kachick/rubinius,jsyeo/rubinius,kachick/rubinius,jsyeo/rubinius,kachick/rubinius,kachick/rubinius,kachick/rubinius,jsyeo/rubinius,jsyeo/rubinius,jsyeo/rubinius,jsyeo/rubinius