[3979] Removed notes in the statistics about lease expiration not impl.

doc/guide/dhcp4-srv.xml

@@ -2968,11 +2968,10 @@ It is merely echoed by the server
               given subnet.  This statistic increases every time a new lease is
               allocated (as a result of receiving a DHCPREQUEST message) and is
               decreased every time a lease is released (a DHCPRELEASE message is
-              received). When lease expiration is implemented (planned for Kea
-              1.0), it will also decrease when a lease is expired. The
-              <emphasis>id</emphasis> is the subnet-id of a given subnet. This
-              statistic is exposed for each subnet separately. This statistic is
-              reset during reconfiguration event.</entry>
+              received) or expires. The <emphasis>id</emphasis> is the subnet-id
+              of a given subnet. This statistic is exposed for each subnet
+              separately. This statistic is reset during reconfiguration event.
+              </entry>
             </row>
         </tbody>
         </tgroup>

doc/guide/dhcp6-srv.xml

@@ -2921,11 +2921,10 @@ should include options from the isc option space:
             This statistic shows the number of NA addresses in a given subnet that
             are assigned. This statistic increases every time a new lease is allocated
             (as a result of receiving a REQUEST message) and is decreased every time a
-            lease is released (a RELEASE message is received). When lease expiration
-            is implemented (planned for Kea 1.0), it will also decrease when a lease
-            is expired. The <emphasis>id</emphasis> is the subnet-id of a given
-            subnet. This statistic is exposed for each subnet separately. This
-            statistic is reset during a reconfiguration event.
+            lease is released (a RELEASE message is received) or expires. The
+            <emphasis>id</emphasis> is the subnet-id of a given subnet. This
+            statistic is exposed for each subnet separately. This statistic is
+            reset during a reconfiguration event.
             </entry>
             </row>
 
@@ -2951,11 +2950,10 @@ should include options from the isc option space:
             This statistic shows the number of PD prefixes in a given subnet that
             are assigned. This statistic increases every time a new lease is allocated
             (as a result of receiving a REQUEST message) and is decreased every time a
-            lease is released (a RELEASE message is received). When lease expiration
-            is implemented (planned for Kea 1.0), it will also decrease when a lease
-            is expired. The <emphasis>id</emphasis> is the subnet-id of a given
-            subnet. This statistic is exposed for each subnet separately. This
-            statistic is reset during a reconfiguration event.
+            lease is released (a RELEASE message is received) or expires. The
+            <emphasis>id</emphasis> is the subnet-id of a given subnet. This statistic
+            is exposed for each subnet separately. This statistic is reset during a
+            reconfiguration event.
             </entry>
             </row>