bpo-40328: Add tool for generating cjk mapping headers (GH-19602)
diff --git a/Modules/cjkcodecs/README b/Modules/cjkcodecs/README
index 8f08f2d..165ae7a 100644
--- a/Modules/cjkcodecs/README
+++ b/Modules/cjkcodecs/README
@@ -1,8 +1,6 @@
To generate or modify mapping headers
-------------------------------------
-Mapping headers are imported from CJKCodecs as pre-generated form.
-If you need to tweak or add something on it, please look at tools/
-subdirectory of CJKCodecs' distribution.
+Mapping headers are generated from Tools/unicode/genmap_*.py