Remove duplicate copyright section, remove history
Remove duplicate copyright section, remove history

vmodtool already includes the copyright from the boilerplate

Authors and contributors are numerous, so we'd either need to name
them all or none.

feld/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache