Revert "comment out zmet parameter check.  Not elegant."
Revert "comment out zmet parameter check.  Not elegant."

This reverts commit 5ac79ec4b2896058f2fce7e8575d3d25a2e75184.  The commit was not necessary since compute_zdep uses the logzsol parameter, not the zmet parameter.

ajmendez/python-fsps,nell-byler/python-fsps,jrleja/python-fsps,bd-j/python-fsps,dfm/python-fsps