utility: Remove getService function

The getService function is no longer used and is not necessary with the
getService function within sdbusplus.hpp

Tested: N/A

Change-Id: Ifad8ec1efb64508923d4f5c42bef318f0b03124c
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
2 files changed