remove orphant env vars from skeleton sys.config

include/mad.hrl

@@ -1 +1 @@
--define(VERSION,"a21c9c").
+-define(VERSION,"9c25cd").

priv/web/sys.config

@@ -3,7 +3,6 @@
         {cowboy_spec,cow2},
         {app,sample},
         {upload,"./priv/static/"},
-        {mode,dev},
         {routes,routes},
         {mq,n2o_gproc},
         {formatter,n2o_bert},
@@ -20,7 +19,6 @@
         {log_backend,n2o_io},
         {session,n2o_session},
         {origin,<<"*">>},
-        {bridge,n2o_cowboy},
         {pickler,n2o_secret},
         {erroring,n2o_error},
         {event,pickle}]},