fixed: PurgeOldInboxMessages just didnt work

docs/changelog/7.x.x.txt

@@ -8,6 +8,7 @@
  - fixed: DataForm doesn't work properly with internationalized fields
  - fixed: incoming data not properly decoded from utf8
  - fixed: Can't call method "getSku" on unblessed reference
+ - fixed: PurgeOldInboxMessages just didn't work
 
 7.5.22
  - fixed: Layout template now gets prepared correctly

lib/WebGUI/Workflow/Activity/PurgeOldInboxMessages.pm

@@ -84,13 +84,9 @@ sub execute {
     # keep track of how much time it's taking
     my $start   = time;
 
-    # Only purge this many per operation to prevent MySQL returning
-    # a half-million rows (which will take longer than the time we have)
-    my $limit   = 2_500;
-
     my $sth 
         = $session->db->read(
-            "SELECT messageId FROM inbox WHERE completedOn IS NOT NULL AND dateStamp < ? ASC LIMIT $limit",
+            "SELECT messageId FROM inbox WHERE completedOn IS NOT NULL AND dateStamp < ?",
             [ $start - $self->get('purgeAfter') ],
         );