build/cargo-build-system: Remove 'update-cargo-lock phase.

* guix/build/cargo-build-system.scm (update-cargo-lock): Remove
procedure.
(configure): Delete Cargo.lock file if it exists.
(%standard-phases): Remove 'update-cargo-lock.
* doc/guix.texi (Build System)[cargo-build-system]: Remove references to
the 'update-cargo-lock phase.

1 files changed, 4 insertions, 5 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 90b2deb251..707c2ba700 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5854,11 +5854,10 @@ should be added to the package definition via the
 
 In its @code{configure} phase, this build system will make any source inputs
 specified in the @code{#:cargo-inputs} and @code{#:cargo-development-inputs}
-parameters available to cargo.  The @code{update-cargo-lock} phase will,
-when there is a @code{Cargo.lock} file, update the @code{Cargo.lock} file
-with the inputs and their versions available at build time.  The
-@code{install} phase installs any crate the binaries if they are defined by
-the crate.
+parameters available to cargo.  It will also remove an included
+@code{Cargo.lock} file to be recreated by @code{cargo} during the
+@code{build} phase.  The @code{install} phase installs any crate the binaries
+if they are defined by the crate.
 @end defvr
 
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