[LyX/master] Ditch alphadin from the distribution

[Juergen Spitzmueller]

commit c7f6846bbe007af3d6010339eb48147f6236cdf4
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Sat Jan 20 15:47:56 2024 +0100

    Ditch alphadin from the distribution

 lib/doc/Makefile.am         |    1 -
 lib/doc/UserGuide.lyx       |    8 +-
 lib/doc/ar/UserGuide.lyx    |    8 +-
 lib/doc/biblio/alphadin.bst | 1665 -------------------------------------------
 lib/doc/de/UserGuide.lyx    |    8 +-
 lib/doc/es/UserGuide.lyx    |    9 +-
 lib/doc/fr/UserGuide.lyx    |   13 +-
 lib/doc/ja/UserGuide.lyx    |   18 +-
 lib/doc/ru/UserGuide.lyx    |   19 +-
 9 files changed, 55 insertions(+), 1694 deletions(-)