relnotes/5.2

branchcache: drop the unused `_verifyclosed`

This code appears dead since its introduction about 5 years ago in this three
consecutive commits:

- 6578654916ae → introduce the method with two calls
- 7c9d4cf23adf → remove first call
- be5eeaf5c24a → remove second call


    o  changeset:   be5eeaf5c24a
    |  user:        Pulkit Goyal <[e-mail]>
    |  date:        Fri Apr 05 15:57:09 2019 +0300
    |  summary:     branchcache: don't verify closed nodes in _branchtip()
    |
    o  changeset:   7c9d4cf23adf
    |  user:        Pulkit Goyal <[e-mail]>
    |  date:        Fri Apr 05 15:56:33 2019 +0300
    |  summary:     branchcache: don't verify closed nodes in iteropen()
    |
    o  changeset:   6578654916ae
    |  user:        Pulkit Goyal <[e-mail]>
    ~  date:        Mon Apr 01 13:56:47 2019 +0300
       summary:     branchcache: lazily validate nodes from the branchmap

== New Features ==

 * The amend extension supports the `--currentuser` argument.

 * The amend extension supports the `--close-branch` argument.

 * The amend extension supports the `--secret` argument.

 * The uncommit extension supports the `rewrite.update-timestamp` config option.

== New Experimental Features ==


== Bug Fixes  ==


== Backwards Compatibility Changes ==

 * A shell that supports `$(command)`` syntax for command substitution is now
   required for running the test suite. The test runner normally uses
   `sh`, so if that is a shell that doesn't support `$(command)` syntax,
   you can override it by setting `$HGTEST_SHELL` or by passing it to
   `run-tests.py --shell <shell>`.

 * The (experimental) narrow extension's wire protocol changed. If
   you're using it, you'll need to make sure to upgrade server and
   client at the same time.

== Internal API Changes ==