Remove copyright notice that isn't needed.

debian/copyright

@@ -8,7 +8,6 @@ License: GPL-2.0
 
 Files: debian/*
 Copyright: 2021 Joshua Boniface <joshua@boniface.me>
-Copyright: 2014 Carlos Hernandez <carlos@techbyte.ca>
 License: GPL-2.0
 
 License: GPL-2.0