Remove sort-onscratch/sort-key

* lisp/sort.el (sort-on):
* doc/lispref/sequences.texi (Sequence Functions):
* etc/NEWS:
Remove the `sort-on` function which is now completely superseded by
the extended `sort` in features, ease of use, and performance.

1 files changed, 0 insertions, 5 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 4a68737ba5f..eb6b3285c17 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1734,11 +1734,6 @@ ordering predicates by hand.
 The old signature, '(sort SEQ PREDICATE)', can still be used and sorts
 its input in-place as before.
 
-** New function 'sort-on'.
-This function implements the Schwartzian transform, and is appropriate
-for sorting lists when the computation of the sort key of a list
-element can be expensive.
-
 ** New API for 'derived-mode-p' and control of the graph of major modes.
 
 *** 'derived-mode-p' now takes the list of modes as a single argument.