Comment 2 for bug 1751692

When I introduced that conditional, it was from a upgrade perspective where Newton computes were able to talk to Placement optionally, but where Ocata computes were *needing* to be able to connect to Placement.

During the upgrade to Ocata, there could be chances that operators would miss amending nova.conf in order to make compute nodes able to talk to Placement, and we really wanted to make that hard-failing.

Now that Placement is heavily used in Rocky, with a lot of assertions about the fact that computes can talk to Placement API, I feel it's no longer required to keep such conditional and just remove it entierly.