Unit Tests

- Removed mention of synch.key from all unit tests.  This is an obsolete file.

test/uda_string.t

@@ -53,12 +53,11 @@ like ($output, qr/1\s+one two\s+with/, 'UDA string stored');
 like ($output, qr/2\s+without/,        'UDA string blank');
 
 # Cleanup.
-unlink qw(pending.data completed.data undo.data backlog.data synch.key uda.rc);
+unlink qw(pending.data completed.data undo.data backlog.data uda.rc);
 ok (! -r 'pending.data'   &&
     ! -r 'completed.data' &&
     ! -r 'undo.data'      &&
     ! -r 'backlog.data'   &&
-    ! -r 'synch.key'      &&
     ! -r 'uda.rc', 'Cleanup');
 
 exit 0;