advice: move advice.graftFileDeprecated squashing to commit.[ch]

Move the squashing of the advice.graftFileDeprecated advice over to an
external variable in commit.[ch], allowing advice() to purely use the
new-style API of invoking advice() with an enum.

See 8821e90a09a (advice: don't pointlessly suggest
--convert-graft-file, 2018-11-27) for why quieting this advice was
needed. It's more straightforward to move this code to commit.[ch] and
use it builtin/replace.c, than to go through the indirection of
advice.[ch].

Because this was the last advice_config variable we can remove that
old facility from advice.c.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/commit.h b/commit.h
index df42eb4..3ea3276 100644
--- a/commit.h
+++ b/commit.h
@@ -41,6 +41,7 @@ struct commit {
 };
 
 extern int save_commit_buffer;
+extern int no_graft_file_deprecated_advice;
 extern const char *commit_type;
 
 /* While we can decorate any object with a name, it's only used for commits.. */