… remove old files

for more information, see https://pre-commit.ci

updates:
- [github.com/asottile/pyupgrade: v3.15.2 → v3.16.0](asottile/pyupgrade@v3.15.2...v3.16.0)
- [github.com/PyCQA/flake8: 7.0.0 → 7.1.0](PyCQA/flake8@7.0.0...7.1.0)

Is that actually needed in Plone 6?

updates:
- [github.com/asottile/pyupgrade: v3.16.0 → v3.17.0](asottile/pyupgrade@v3.16.0...v3.17.0)
- [github.com/psf/black: 24.4.2 → 24.8.0](psf/black@24.4.2...24.8.0)
- [github.com/PyCQA/flake8: 7.1.0 → 7.1.1](PyCQA/flake8@7.1.0...7.1.1)
- [github.com/collective/i18ndude: 6.2.0 → 6.2.1](collective/i18ndude@6.2.0...6.2.1)

I noticed that on Jenkins only 142 robot tests were run instead of 149.  The console showed the reason:

```
  Set up plone.app.contenttypes.testing.PloneAppContenttypes in 0.020 seconds.
  Set up plone.app.robotframework.testing.SimplePublicationLayer in 0.001 seconds.
  Set up plone.app.robotframework.remote.RemoteLibraryBundle:RobotRemote in 0.000 seconds.
  Set up plone.testing.zope.WSGIServer in 0.043 seconds.
  Set up plone.app.robotframework.testing.RemoteLibrary:Robot in 0.000 seconds.
  Set up plone.app.discussion.testing.PloneAppDiscussionRobot Traceback (most recent call last):
  File "/Users/maurits/shared-eggs/cp311/zope.testrunner-6.4-py3.11.egg/zope/testrunner/runner.py", line 474, in run_layer
    setup_layer(options, layer, setup_layers)
  File "/Users/maurits/shared-eggs/cp311/zope.testrunner-6.4-py3.11.egg/zope/testrunner/runner.py", line 839, in setup_layer
    setup_layer(options, base, setup_layers)
  File "/Users/maurits/shared-eggs/cp311/zope.testrunner-6.4-py3.11.egg/zope/testrunner/runner.py", line 844, in setup_layer
    layer.setUp()
  File "/Users/maurits/shared-eggs/cp311/plone.app.testing-7.1.0-py3.11.egg/plone/app/testing/helpers.py", line 378, in setUp
    self.setUpPloneSite(portal)
  File "/Users/maurits/community/plone-coredev/6.1/src/plone.app.discussion/plone/app/discussion/testing.py", line 111, in setUpPloneSite
    settings = registry.forInterface(IDiscussionSettings)
  File "/Users/maurits/shared-eggs/cp311/plone.registry-2.0.1-py3.11.egg/plone/registry/registry.py", line 71, in forInterface
    raise KeyError(
KeyError: 'Interface `plone.app.discussion.interfaces.IDiscussionSettings` defines a field `globally_enabled`, for which there is no record.'
```

We are already loading a file with the same name from plone.app.robotframework.

This was moved here from `plone.app.dexterity`, but it has the exact same contents as `tests/functional_test_behavior_discussion.rst`.
I compared again with the original in `plone.app.dexterity`, and it is indeed the same, except that the behavior name is fixed to `plone.allowdiscussion` instead of the former `plone.app.dexterity.behaviors.discussion.IAllowDiscussion`.

The FTIs in `plone.app.contenttypes` do not have them.

…rom FTI."

This reverts commit da5b2f5.

I looked at `plone.app.contenttypes` for comparison, but those are Dexterity FTIs, and here we have an old-style FTI.
When I locally added `icon_expr` in here, I actually got an error while adding a Plone Site:

```
ValueError: http://localhost:8080/@@plone-addsite
Traceback (innermost last):
  Module ZPublisher.WSGIPublisher, line 181, in transaction_pubevents
  Module ZPublisher.WSGIPublisher, line 391, in publish_module
  Module ZPublisher.WSGIPublisher, line 285, in publish
  Module ZPublisher.mapply, line 98, in mapply
  Module ZPublisher.WSGIPublisher, line 68, in call_object
  Module Products.CMFPlone.browser.admin, line 299, in __call__
  Module Products.CMFPlone.factory, line 165, in addPloneSite
  Module Products.GenericSetup.tool, line 393, in runAllImportStepsFromProfile
   - __traceback_info__: profile-Products.CMFPlone:plone
  Module Products.GenericSetup.tool, line 1513, in _runImportStepsFromContext
  Module Products.GenericSetup.tool, line 1360, in _doRunHandler
  Module Products.CMFPlone.setuphandlers, line 139, in importFinalSteps
  Module Products.GenericSetup.tool, line 393, in runAllImportStepsFromProfile
   - __traceback_info__: profile-Products.CMFPlone:dependencies
  Module Products.GenericSetup.tool, line 1504, in _runImportStepsFromContext
  Module Products.GenericSetup.tool, line 1316, in _doRunImportStep
   - __traceback_info__: typeinfo
  Module Products.CMFCore.exportimport.typeinfo, line 222, in importTypesTool
  Module Products.GenericSetup.utils, line 926, in importObjects
   - __traceback_info__: portal_types
  Module Products.GenericSetup.utils, line 922, in importObjects
   - __traceback_info__: types/Discussion_Item
  Module Products.GenericSetup.utils, line 525, in _importBody
  Module Products.CMFCore.exportimport.typeinfo, line 61, in _importNode
  Module Products.GenericSetup.utils, line 757, in _initProperties
ValueError: undefined property 'content_icon'
```

So let's keep the old-style properties, although I am not sure they are actually used anywhere in current Plone.

The `view` action of comments had no icon on Plone 6.

Update the profile version to 3000.  This leaves room for upgrades on the 4.x branch (Plone 6.0).