The tripleo_derived_parameters role still depends on undercloud nova

[Takashi Kajinami]

Description
===========
Undercloud nova has been removed already in favor of the new baremetal node deployment mechanism with metalsmith.
However the tripleo_derived_parameters role in tripleo-ansible still obtains flavor from nova, which is not longer valid.

Steps to reproduce
==================
* Create a plan file with the following contents.
~~~
playbook_parameters:
  cli-derive-parameters.yaml:
    num_phy_cores_per_numa_node_for_pmd: 1
    huge_page_allocation_percentage: 50
~~~
* Deploy overcloud with --plan-environment-file .

Expected result
===============
* Deployment succeeds

Actual result
=============
* Deployment fails because the derive playbook tries to obtain flavor from undercloud nova

Environment
===========
The issue was initially found in master but affects stable branches such as wallaby

Logs & Configs
==============
N/A

[Rabi Mishra (rabi)]

I don't think this is used and broken for a long time. Probably check with the folks and drop it.