close GH-8 Removing random header from DIMACSGraphWriter, as it is no longer used in this file and causes mac compile issues.
close GH-8 Removing random header from DIMACSGraphWriter, as it is no longer used in this file and causes mac compile issues.

tdgoodrich/inddgo_pure,tdgoodrich/inddgo_pure,tdgoodrich/inddgo_pure,tdgoodrich/inddgo_pure,tdgoodrich/inddgo_pure