prov/commit

Revert "FIXED: can no longer rely on access_file to silently fail on http uris"

diff --git a/lib/prov_schema.pl b/lib/prov_schema.pl
index 7f731f1..6c4d111 100644
--- a/lib/prov_schema.pl
+++ b/lib/prov_schema.pl
@@ -228,14 +228,8 @@ log_entity_create(File, Options) :-
     option(prov(ProvBundle), Options),
     option(graph(Graph), Options, none),
     (   uri_is_global(File)
-    ->  Entity = File,
-        xsd_now(TimeStamp)
-    ;   uri_file_name(Entity, File),
-        (   access_file(File, read),
-            time_file(File, Time)
-        ->  xsd_timestamp(Time, TimeStamp)
-	;   xsd_now(TimeStamp)
-        )
+    ->  Entity = File
+    ;   uri_file_name(Entity, File)
     ),
     size_time_stamp(File, Entity, Options),
     rdf_assert(Entity, prov:wasGeneratedBy, Activity, ProvBundle),