remove host-on file rm

The removal of this file was moved into the phosphor-state-manager
applications. This is the final commit in that series:
https://github.com/openbmc/phosphor-state-manager/commit/4a4c1a69432dd88a4204e7a15a838aae75ae1d12

Clearing it in the host stop path in this service file caused
complexity with other paths like BMC resets with the host up and
warm reboots.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I4e156d3818b225529c6a6c172d7042d5ca431804
1 file changed