doc: Document lockfile importer based Rust packaging workflow.

* doc/guix.texi (Build Systems) [cargo-build-system]: Add cross-reference for
the term "Cargo workspaces".
* doc/contributing.texi (Packaging Guidelines)[Rust Crates]: Update
documentation.
* doc/guix-cookbook.texi (Packaging)[Packaging Workflow]: New section.
* gnu/packages/rust-crates.scm,
* gnu/packages/rust-sources.scm: Stop mentioning guix-rust-registry for now, we
may remove the repository if future merges are managed well.

Change-Id: Ic0c6378cf5f5df97d6f8bdd040b486be62c7bddc

2 files changed, 0 insertions, 8 deletions

diff --git a/gnu/packages/rust-crates.scm b/gnu/packages/rust-crates.scm
index 8612868871b..73975b79c4f 100644
--- a/gnu/packages/rust-crates.scm
+++ b/gnu/packages/rust-crates.scm
@@ -28,10 +28,6 @@
 ;;;
 ;;; This file is managed by ‘guix import’.  Do NOT add definitions manually.
 ;;;
-;;; Commit changes to: https://codeberg.org/guix/guix-rust-registry
-;;;
-
-;;;
 ;;; Rust libraries fetched from crates.io and non-workspace development
 ;;; snapshots.
 ;;;
diff --git a/gnu/packages/rust-sources.scm b/gnu/packages/rust-sources.scm
index 9fa7689b36a..1950a79a73a 100644
--- a/gnu/packages/rust-sources.scm
+++ b/gnu/packages/rust-sources.scm
@@ -37,10 +37,6 @@
   #:use-module (gnu packages textutils))
 
 ;;;
-;;; Commit changes to: https://codeberg.org/guix/guix-rust-registry
-;;;
-
-;;;
 ;;; Cargo workspaces and Rust libraries requiring external inputs to unbundle.
 ;;; These packages are hidden, as they are not interesting to users.
 ;;;