ci: rm the lock file testing (bazel-contrib#2430)

This was not something that turned out to be useful and it is causing
enough
friction that it makes it not worth it.

Summary:
- remove presubmit checks checking lockfile
- remove the pre-commit hooks for lock file updating
- remove the note about the lock file
- remove the MODULE.bazel.lock

---------

Co-authored-by: Richard Levasseur <[email protected]>

Author: aignas

.bazelci/presubmit.yml

@@ -298,28 +298,6 @@ tasks:
     working_directory: examples/bzlmod
     platform: windows
     bazel: last_rc
-  integration_test_bzlmod_ubuntu_lockfile:
-    <<: *reusable_build_test_all
-    <<: *coverage_targets_example_bzlmod
-    name: "examples/bzlmod: Ubuntu with lockfile"
-    working_directory: examples/bzlmod
-    platform: ubuntu2004
-    bazel: 7.x
-    shell_commands:
-    # Update the lockfiles and fail if it is different.
-    - "../../tools/private/update_bzlmod_lockfiles.sh"
-    - "git diff --exit-code"
-  integration_test_bzlmod_macos_lockfile:
-    <<: *reusable_build_test_all
-    <<: *coverage_targets_example_bzlmod
-    name: "examples/bzlmod: macOS with lockfile"
-    working_directory: examples/bzlmod
-    platform: macos
-    bazel: 7.x
-    shell_commands:
-    # Update the lockfiles and fail if it is different.
-    - "../../tools/private/update_bzlmod_lockfiles.sh"
-    - "git diff --exit-code"
 
   integration_test_bzlmod_generate_build_file_generation_ubuntu_min:
     <<: *minimum_supported_version

.gitignore

@@ -52,4 +52,3 @@ user.bazelrc
 # MODULE.bazel.lock is ignored for now as per recommendation from upstream.
 # See https://github.com/bazelbuild/bazel/issues/20369
 MODULE.bazel.lock
-!/examples/bzlmod/MODULE.bazel.lock

.pre-commit-config.yaml

@@ -49,9 +49,3 @@ repos:
         entry: bazel run @rules_bazel_integration_test//tools:update_deleted_packages
         files: ^((examples|tests)/.*/(MODULE.bazel|WORKSPACE|WORKSPACE.bzlmod|BUILD.bazel)|.bazelrc)$
         pass_filenames: false
-      - id: update-bzlmod-lockfiles
-        name: Update bzlmod lockfiles
-        language: script
-        entry: ./tools/private/update_bzlmod_lockfiles.sh
-        files: ^python/
-        pass_filenames: false

DEVELOPING.md

@@ -56,8 +56,7 @@ The fix being included is commit `deadbeef`.
 1. `git checkout -b release/0.37 0.37.0`
 1. `git push upstream release/0.37`
 1. `git cherry-pick -x deadbeef`
-1. Fix merge conflicts, if any. If `MODULE.bazel.lock` conflicts occur, then
-   run `pre-commit run update-bzlmod-lockfiles -a`
+1. Fix merge conflicts, if any.
 1. `git cherry-pick --continue` (if applicable)
 1. `git push upstream`