cfg80211: docs: remove station_info_flags

I removed the enum earlier, but forgot to remove it from the
documentation - do that now.

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

Documentation/DocBook/80211.tmpl

@@ -113,7 +113,6 @@
 !Finclude/net/cfg80211.h cfg80211_beacon_data
 !Finclude/net/cfg80211.h cfg80211_ap_settings
 !Finclude/net/cfg80211.h station_parameters
-!Finclude/net/cfg80211.h station_info_flags
 !Finclude/net/cfg80211.h rate_info_flags
 !Finclude/net/cfg80211.h rate_info
 !Finclude/net/cfg80211.h station_info