Revert "use exact OBB checks"
Revert "use exact OBB checks"

This reverts commit 187594ac9fc4f9d236492fd4f1354d964c218bbe.

joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue,joaander/hoomd-blue