Remove problematic email headers.
Remove problematic email headers.

Catch another instance of email headers Auto-Submitted and Precedence
which weren't part of the email headers constant.

tcmitchell/geni-ar,GENI-NSF/geni-ar,charliemeyer/geni-ar,charliemeyer/geni-ar,charliemeyer/geni-ar,tcmitchell/geni-ar,tcmitchell/geni-ar,GENI-NSF/geni-ar,tcmitchell/geni-ar,GENI-NSF/geni-ar,charliemeyer/geni-ar,tcmitchell/geni-ar,GENI-NSF/geni-ar,GENI-NSF/geni-ar,charliemeyer/geni-ar