diff -r 145e45cd7a0f -r b125dcf14489 TODO.md
--- a/TODO.md	Wed Aug 03 17:18:47 2022 +0200
+++ b/TODO.md	Wed Aug 03 18:06:02 2022 +0200
@@ -79,12 +79,6 @@
     (*2*)val _ = @{print tracing}{a = "hd_ord (f, g)      = ", z = hd_ord (f, g)}(**)
 
 
-* WN: eliminate global flags like "trace_on", replace Unsynchronized.ref by
-
-ML \<open>
-  val rewrite_trace = Attrib.setup_config_bool \<^binding>\<open>rewrite_trace\<close> (K false);
-\<close>
-
 * WN: Calculate.thy: add structure Calculate
 * WN: cleanup method-def.sml, problem-def.sml, "eval-def.sml", "rewrite-order.sml"
 * WN: MethodC.from_store throws exn 'get_pbt not found: ' ... confusing !! take 'ketype' as an argument