Remove 3 unneeded functions
Remove 3 unneeded functions

They only redirect call to function in instance bellow.

Closes: #380
Approved by: m-blaha

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