CHANGELOG.

CHANGELOG.md

@@ -23,6 +23,9 @@ API-breaking change is listed.
   implementation detail. `stdpp.list_numbers` is now re-exported by `stdpp.list`
   and also considered part of the list module, so existing imports should be
   updated.
+- Remove `list_remove` and `list_remove_list`. There were no lemmas about these
+  functions; they existed solely to facilitate the proofs of decidability of
+  `submseteq` and `≡ₚ`, which have been refactored.
 
 The following `sed` script should perform most of the renaming
 (on macOS, replace `sed` by `gsed`, installed via e.g. `brew install gnu-sed`).