Remove reports key from get_best_selector()
Remove reports key from get_best_selector()

Closes: #390
Approved by: jrohel

edynox/libdnf,Conan-Kudo/libhif,Conan-Kudo/libhif,rpm-software-management/libdnf,edynox/libdnf,Conan-Kudo/libhif,rpm-software-management/libdnf,rpm-software-management/libdnf,hughsie/libhif,rpm-software-management/libhif,rpm-software-management/libhif,hughsie/libhif,rpm-software-management/libhif,rpm-software-management/libhif,hughsie/libhif,rpm-software-management/libdnf,hughsie/libhif,edynox/libdnf,edynox/libdnf,Conan-Kudo/libhif