Remove unused service interfaces

Remove unused service interfaces

There are various places where dependency injection is used to get service interfaces. The ones removed in this patch were unsused. This will make it easier to implement the southbound equivalent of the services since these removed ones can be ignored.

Patch set 2: Modify unit tests verify clauses to not expect certain methods to have been called.

Change-Id: I2fd815d92631039a7dc923bf35c3aa863d19e47a
Signed-off-by: Sam Hague <shague@redhat.com>