#5957 Remove ly:lexer-keywords command

[David Kastrup]

Remove ly:lexer-keywords command

It has been unused since its inception. If it were to be retained, it
would make more sense to remove its (sole) argument since it was effectively
being ignored (other than that the presence of a Lexer guarantees that the
keyword table has been initialised). Supporting member function
Lily_lexer::keyword_list is removed alongside.

http://codereview.appspot.com/559960060

[Anonymous]

Passes make, make check and a full make doc.

[Anonymous]

Patch on countdown for May 6th

[Anonymous]

Patch counted down - please push

[Anonymous]

Issue 5957: Remove ly:lexer-keywords command
author  David Kastrup <dak@gnu.org> 
    Sat, 2 May 2020 10:43:55 +0100 (11:43 +0200)
committer   David Kastrup <dak@gnu.org> 
    Thu, 7 May 2020 10:29:00 +0100 (11:29 +0200)
commit  53d3c069de1f3c20aa42179f347836a35ce46231