[aur-general] Remove request dexter-bzr

Hi everyone, this[1] is an old, developement version (not developed anymore under this name) of this[2] therefore I think it should be removed. [1] https://aur.archlinux.org/packages/dexter-bzr/ [2] https://aur.archlinux.org/packages/dexter-contacts-bzr/ Thanks, Edoardo