mason: update for twitter vocab changes

extra/mason/config/config.factor

@@ -17,11 +17,6 @@ SYMBOL: builder-from
 ! Who receives build report e-mails.
 SYMBOL: builder-recipients
 
-! (Optional) twitter credentials for status updates.
-SYMBOL: builder-twitter-username
-
-SYMBOL: builder-twitter-password
-
 ! (Optional) CPU architecture to build for.
 SYMBOL: target-cpu
 

extra/mason/twitter/twitter.factor

@@ -1,14 +1,7 @@
-! Copyright (C) 2009 Slava Pestov.
+! Copyright (C) 2009, 2010 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: debugger fry kernel mason.config namespaces twitter ;
 IN: mason.twitter
 
 : mason-tweet ( message -- )
-    builder-twitter-username get builder-twitter-password get and
-    [
-        [
-            builder-twitter-username get twitter-username set
-            builder-twitter-password get twitter-password set
-            '[ _ tweet ] try
-        ] with-scope
-    ] [ drop ] if ;
+    twitter-access-token get [ '[ _ tweet ] try ] [ drop ] if ;