Remove duplicate

src/freedombone-app-xmpp

@@ -525,10 +525,6 @@ function update_prosody_modules {
         sed -i '/"pep";/a "block_strangers"; -- Dont allow messages from strangers' /etc/prosody/conf.avail/xmpp.cfg.lua
         sed -i 's|"block_strangers";|  "block_strangers";|g' /etc/prosody/conf.avail/xmpp.cfg.lua
     fi
-    if ! grep -q "block_strangers" /etc/prosody/conf.avail/xmpp.cfg.lua; then
-        sed -i '/"pep";/a "block_strangers"; -- Dont allow messages from strangers' /etc/prosody/conf.avail/xmpp.cfg.lua
-        sed -i 's|"block_strangers";|  "block_strangers";|g' /etc/prosody/conf.avail/xmpp.cfg.lua
-    fi
 }
 
 function prosody_daemon_restart_script {