Filter pyximport DeprecationWarning from imp
Filter pyximport DeprecationWarning from imp

This warning has been around forever, and pyximport is a fairly dead
module at this point, though it still works for our purposes.  The imp
library is slated for removal in Python 3.12, but our intent is to have
removed all usage of pyximport in the QuTiP 5.0 release - it's really
quite a nuclear approach for us to modify a user's import machinery when
they import QuTiP.

qutip/qutip,cgranade/qutip,qutip/qutip,cgranade/qutip