remove bundled services from rootdir/init.rc

Services definitions for core services are now bundled with the source
for the service itself in the form of <service name>.rc.  These
individual .rc files are now located in /system/init/... and are
parsed when the system partition is mounted.

Bug: 23186545
Change-Id: Ia1b73af8d005633aa4252d603892064d7804163d