kqueue.9: Update the description of knlist_clear()

knlist_clear() does not free knotes and so does not call fdrop(), so
remove the bit of the function description which claims otherwise.  (The
knote will be dropped by the next queue scan, and it is at that point
that the fd reference will be dropped.)

MFC after:	1 week

1 files changed, 1 insertions, 11 deletions

diff --git a/share/man/man9/kqueue.9 b/share/man/man9/kqueue.9
index ddd834bb1807..8214d7c01673 100644
--- a/share/man/man9/kqueue.9
+++ b/share/man/man9/kqueue.9
@@ -22,7 +22,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd August 20, 2022
+.Dd December 18, 2023
 .Dt KQUEUE 9
 .Os
 .Sh NAME
@@ -320,16 +320,6 @@ The
 function will be called when the
 .Vt knote
 is deleted during the next scan.
-This function must not be used when
-.Va f_isfd
-is set in
-.Vt "struct filterops" ,
-as the
-.Fa td
-argument of
-.Fn fdrop
-will be
-.Dv NULL .
 .Pp
 The function
 .Fn knlist_delete