qcacld-3.0: Remove obsolete HDD NAN config stubs
Change I5af85d68ee53ad557e64523f7a1719e328536926 ("qcacld-3.0: Update
for converged NAN config params") relocated the NAN INI parsing.
However the change failed to remove the stub implementations of the
following functions, so remove them now:
- hdd_nan_populate_cds_config()
- hdd_nan_populate_pmo_config()
Change-Id: Ic2e7ed3e9a30fb20541734c0a72b55e6478877cf
CRs-Fixed: 2368712