All accesses to control launching applications are now done
via agl-service-homescreen/libhomescreen, and thus the unused
DBus interface can be removed.
Bug-AGL: SPEC-3137
Change-Id: I56201c138c7061bba8114e367729d2b29f672ed1 Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>