Update stig-fix.cfg

Removing dracut-fips as a requirement because it brings up error messages in RHEL 6.6 when not enabled. The stig-fix-el6 hardening script will install the requirement by enabling /opt/stig-fix/manual/gen000588-fips140-2.sh - enable FIPS at your own risk because lots of products still use md5 and other "insecure" cryptographic algorithms.