[#4322] Remove old reference to subscriber-only hook

diff --git a/doc/sphinx/arm/ddns.rst b/doc/sphinx/arm/ddns.rst
index fdc6515505f64a26fff0da3d1308717eeffc5622..508952b29fbfe3c4dc018d4a70e7ba63920dd095 100644 (file)
--- a/doc/sphinx/arm/ddns.rst
+++ b/doc/sphinx/arm/ddns.rst
@@ -1092,7 +1092,7 @@ Currently Kea's statistics management has the following limitations:
 
 .. note::
 
-    Hook libraries, such as the ISC subscriber-only GSS-TSIG library,
+    Hook libraries, such as the GSS-TSIG library,
     make new statistics available in Kea.
 
 More information about Kea statistics can be found at :ref:`stats`.