asterisk: Drop the very old version from meta-telephony

We used asterisk to be able to speak SIP with the outside. LCR
has gained this capability in the past and we haven't used asterisk
in more than two years.

Asterisk doesn't seem to compile with master/dizzy and there is
little point in figuring out why.
diff --git a/recipes-isdn/lcr/files/lcr.init b/recipes-isdn/lcr/files/lcr.init
index f9924c5..3bf7980 100644
--- a/recipes-isdn/lcr/files/lcr.init
+++ b/recipes-isdn/lcr/files/lcr.init
@@ -7,7 +7,7 @@
 case "$1" in
   start)
     /usr/sbin/lcr fork 
-    echo "Forked asterisk"
+    echo "Forked LCR"
     ;;
   stop)
     echo "Can not stop it"