Remove the variable load-convert-to-unibyte

It has been ineffective since 2002.
Suggested by Lynn Winebarger.

* src/lread.c (Fload, readevalloop_1, readevalloop, Feval_buffer)
(Feval_region, syms_of_lread): Remove the variable and its propagation.
* etc/NEWS: Announce.

1 files changed, 3 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index d32b2434de1..c778b8239b6 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -2507,6 +2507,9 @@ instead, which gives the time offset as +/-hh or +/-hh:mm.  A designator
 formats, like "2025-06-04 13:21:00 EDT", without the ISO 8601 "T"
 separator, are also supported.
 
+---
+** The obsolete variable 'load-convert-to-unibyte' has been removed.
+
 
 * Lisp Changes in Emacs 31.1