removed obsolete object.ML (see Pure/library.ML);

--- a/src/Pure/General/ROOT.ML	Wed Jun 22 19:41:23 2005 +0200
+++ b/src/Pure/General/ROOT.ML	Wed Jun 22 19:41:24 2005 +0200
@@ -13,7 +13,6 @@
 use "source.ML";
 use "symbol.ML";
 use "name_space.ML";
-use "object.ML";
 use "seq.ML";
 use "susp.ML";
 use "lazy_seq.ML";