wifi: nl80211: Remove unused declaration nl80211_pmsr_dump_results()

nl80211_pmsr_dump_results() is never implemented since it was added in
commit 9bb7e0f2 ("cfg80211: add peer measurement with FTM initiator
API").

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230729121651.36836-1-yuehaibing@huawei.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>