Remove TLEN related transport code/icons

This Messenger shut down and is not available anymore

gajim/common/app.py

@@ -448,7 +448,7 @@ def get_transport_name_from_jid(jid, use_config_setting = True):
         # now we support both 'icq.' and 'icq' but not icqsucks.org
         host = host_splitted[0]
 
-    if host in ('irc', 'icq', 'sms', 'tlen', 'weather', 'yahoo',
+    if host in ('irc', 'icq', 'sms', 'weather', 'yahoo',
     'mrim', 'facebook'):
         return host
     elif host == 'gg':