Revert "build: Add a commit-msg hook that embeds Change-Id in commit messages."

This reverts commit 8005e09b261d65bf0f7469cd8e89423c1c1db820 and follow-ups.
This was added 2 years ago to be able to trace commits between the git
repository and the guix-patches tracker, and to implement a solution to
automatically close merged commits (which has not materialized).

Since we have now migrated to Codeberg, the cross-referencing between reviewed
commits (pull requests) and the actual commits merged can be done in the
Codeberg UI (via the 'manually merged' option), and Codeberg also supports
closing a bug via the "Fixes: #NNN" git trailer, and as a convention we can
add a "Merges: !NNN" git trailer in a commit closing a PR (the actual closing
is not yet implemented by Forgejo), which mostly obsoletes the purpose of the
Change-Id git trailer.

1 files changed, 1 insertions, 9 deletions

diff --git a/doc/contributing.texi b/doc/contributing.texi
index 0da29d4c68b..0863bf5c2f4 100644
--- a/doc/contributing.texi
+++ b/doc/contributing.texi
@@ -2250,16 +2250,8 @@ different name or email just for commits in this repository, you can
 use @command{git config --local}, or edit @file{.git/config} in the
 repository instead of @file{~/.gitconfig}.
 
-@cindex commit-msg hook
 Other important Git configuration will automatically be configured when
-building the project (@pxref{Building from Git}).  A
-@file{.git/hooks/commit-msg} hook will be installed that embeds
-@samp{Change-Id} Git @emph{trailers} in your commit messages for
-traceability purposes.  It is important to preserve these when editing
-your commit messages, particularly if a first version of your proposed
-changes was already submitted for review.  If you have a
-@file{commit-msg} hook of your own you would like to use with Guix, you
-can place it under the @file{.git/hooks/commit-msg.d/} directory.
+building the project (@pxref{Building from Git}).
 
 @node Tracking Bugs and Changes
 @section Tracking Bugs and Changes