qcacld-3.0: Remove enum tdls_concerned_external_events

Change Ia860904685fc4783453491effa4518777c7406d0 ("qcacld-3.0:
TDLS: remove legacy interfaces") removed the last reference to
enum tdls_concerned_external_events. Since this enum is now unused,
remove it.

Change-Id: Ie21072a45d7c083d4f0f661906ca9cabb17a6178
CRs-Fixed: 2370025
1 file changed