diff --git a/constraints.txt b/constraints.txt
deleted file mode 100644
index c1bc0c625b..0000000000
--- a/constraints.txt
+++ /dev/null
@@ -1,438 +0,0 @@
-# File created by /Users/timo/workspace/plone/buildout.coredev-6.0/scripts/create-constraints.py
-# Constraints parsed from buildout.cfg
-AccessControl==5.0
-Acquisition==4.7
-AuthEncoding==4.2
-BTrees==4.7.2
-Babel==2.9.0
-Chameleon==3.9.0
-DateTime==4.3
-Deprecated==1.2.10
-DocumentTemplate==4.0
-ExtensionClass==4.5.0
-FormEncode==1.3.1
-Genshi==0.7.3
-GitPython==3.0.5
-Jinja2==2.11.3
-MarkupSafe==1.1.1
-Missing==4.1
-MultiMapping==4.1
-Paste==3.5.0
-PasteDeploy==2.1.1
-Persistence==3.0
-Plone==5.2.2
-Products.BTreeFolder2==4.2
-Products.CMFCore==2.5.1
-Products.CMFDiffTool==3.3.2
-Products.CMFDynamicViewFTI==6.0.3
-Products.CMFEditions==4.0.0a1
-Products.CMFPlacefulWorkflow==2.0.4
-Products.CMFPlone==5.2.2
-Products.CMFUid==3.1.0
-Products.DCWorkflow==2.5.0
-Products.DateRecurringIndex==3.0.1
-Products.ExtendedPathIndex==4.0.1
-Products.ExternalEditor==3.0.1
-Products.ExternalMethod==4.5
-Products.GenericSetup==2.1.1
-Products.MailHost==4.11
-Products.MimetypesRegistry==2.1.8
-Products.PDBDebugMode==2.0
-Products.PloneLanguageTool==3.2.10
-Products.PlonePAS==6.0.7
-Products.PloneTestCase==0.9.18
-Products.PluggableAuthService==2.6.2
-Products.PluginRegistry==1.9
-Products.PortalTransforms==3.1.10
-Products.PrintingMailHost==1.1.6
-Products.PythonScripts==4.12
-Products.SecureMailHost==1.1.2
-Products.Sessions==4.9
-Products.SiteErrorLog==5.5
-Products.StandardCacheManagers==4.0.3
-Products.ZCatalog==6.0
-Products.ZODBMountPoint==1.0
-Products.ZSQLMethods==3.11
-Products.ZopeVersionControl==2.0.0
-Products.contentmigration==2.2.1
-Products.isurlinportal==1.1.1
-Products.statusmessages==5.0.5
-Products.validation==2.1.3
-PyGithub==1.47
-Pygments==2.7.4
-Record==3.5
-RestrictedPython==5.1
-SecretStorage==3.3.1
-Sphinx==3.4.3
-WSGIProxy2==0.4.6
-WebOb==1.8.6
-WebTest==2.0.35
-ZConfig==3.5.0
-ZEO==5.2.2
-ZODB==5.6.0
-ZODB3==3.11.0
-Zope==5.1.2
-Zope2==4.0
-ZopeUndo==4.3
-alabaster==0.7.12
-appdirs==1.4.4
-argcomplete==1.12.2
-argh==0.26.2
-attrs==20.3.0
-backports.functools-lru-cache==1.6.1
-beautifulsoup4==4.9.3
-bleach==3.3.0
-borg.localrole==3.1.8
-build==0.1.0
-buildout.requirements==0.2.2
-buildout.wheel==0.2.0
-cachecontrol==0.12.6
-cached-property==1.5.2
-calmjs.parse==1.2.5
-certifi==2020.12.5
-cffi==1.14.4
-chardet==4.0.0
-check-manifest==0.46
-click==7.1.2
-cmarkgfm==0.5.2
-collective.MockMailHost==2.0.0
-collective.js.jqueryui==2.1.6
-collective.monkeypatcher==1.2.1
-collective.recipe.cmd==0.11
-collective.recipe.omelette==1.0.0
-collective.recipe.sphinxbuilder==1.1
-collective.recipe.template==2.1
-collective.recipe.vscode==0.1.6
-collective.xmltestreport==2.0.2
-collective.z3cform.datagridfield==2.0
-collective.z3cform.datetimewidget==1.2.9
-colorama==0.4.4
-configparser==5.0.1
-contextlib2==0.6.0.post1
-coverage==5.4
-cryptography==3.4.4
-cssselect==1.1.0
-decorator==4.4.2
-diazo==1.4.0
-distlib==0.3.1
-distro==1.5.0
-docutils==0.16
-entrypoints==0.3
-enum34==1.1.10
-fancycompleter==0.9.1
-feedparser==6.0.1
-filelock==3.0.12
-five.customerize==2.0.1
-five.intid==1.2.6
-five.localsitemanager==3.2.2
-funcsigs==1.0.2
-functools32==3.2.3.post2
-future==0.18.2
-futures==3.3.0
-gitdb2==2.0.6
-html5lib==1.1i
-httplib2==0.18.1
-i18ndude==5.4.0
-icalendar==4.0.7
-idna==2.10
-imagesize==1.2.0
-importlib-metadata==3.4.0
-incremental==17.5.0
-interlude==1.3.1
-ipaddress==1.0.23
-jeepney==0.6.0
-jsonschema==3.2.0
-keyring==22.0.1
-launchpadlib==1.10.13
-lazr.restfulclient==0.14.3
-lazr.uri==1.0.5
-lockfile==0.12.2
-lxml==4.6.2
-manuel==1.10.1
-markdown==3.2.2
-mock==4.0.3
-mockup==3.2.2
-more-itertools==8.7.0
-mr.developer==2.0.1
-msgpack==0.6.2
-multipart==0.2.4
-nose==1.3.7
-nt-svcutils==2.13.0
-oauthlib==3.1.0
-olefile==0.46
-ordereddict==1.1
-packaging==20.9
-pathlib==1.0.1
-pathlib2==2.3.5
-pbr==5.5.1
-pdbpp==0.10.2
-pep517==0.9.1
-persistent==4.6.4
-piexif==1.1.3
-pillow==8.2.0
-pip==21.0.1
-pkginfo==1.7.0
-plone.alterego==1.1.5
-plone.api==1.10.4
-plone.app.blocks==5.0.0
-plone.app.caching==3.0.0a4
-plone.app.content==4.0.0a2
-plone.app.contentlisting==2.0.3
-plone.app.contentmenu==2.3.2
-plone.app.contentrules==5.0.0a1
-plone.app.contenttypes==3.0.0a2
-plone.app.customerize==1.3.11
-plone.app.debugtoolbar==1.2.2
-plone.app.dexterity==3.0.0a1
-plone.app.discussion==4.0.0a1
-plone.app.drafts==1.1.3
-plone.app.event==4.0.0a3
-plone.app.i18n==3.0.6
-plone.app.intid==1.1.4
-plone.app.iterate==3.3.16
-plone.app.layout==4.0.0a1
-plone.app.linkintegrity==3.6.2
-plone.app.locales==5.1.28
-plone.app.lockingbehavior==1.0.7
-plone.app.mosaic==2.2.3
-plone.app.multilingual==6.0.0a1
-plone.app.portlets==5.0.0a1
-plone.app.querystring==1.4.14
-plone.app.redirector==2.2.1
-plone.app.registry==2.0.0a1
-plone.app.relationfield==2.0.3
-plone.app.robotframework==1.5.6
-plone.app.standardtiles==2.4.0
-plone.app.testing==6.1.8
-plone.app.textfield==1.3.5
-plone.app.theming==4.1.6
-plone.app.tiles==3.2.1
-plone.app.upgrade==2.0.38
-plone.app.users==3.0.0a1
-plone.app.uuid==2.0.2
-plone.app.versioningbehavior==1.4.3
-plone.app.viewletmanager==3.1.1
-plone.app.vocabularies==4.2.2
-plone.app.widgets==3.0.5
-plone.app.workflow==5.0.0a1
-plone.app.z3cform==4.0.0a1
-plone.autoform==1.9.0
-plone.batching==2.0.0a1
-plone.behavior==1.4.0
-plone.browserlayer==2.2.4
-plone.cachepurging==2.0.3
-plone.caching==1.2.2
-plone.contentrules==2.1.1
-plone.dexterity==2.10.0
-plone.event==1.4.1
-plone.folder==3.1.0
-plone.formwidget.autocomplete==1.4.0
-plone.formwidget.contenttree==1.2.0
-plone.formwidget.datetime==1.3.5
-plone.formwidget.namedfile==3.0.0a1
-plone.formwidget.querystring==1.1.10
-plone.formwidget.recurrence==2.1.4
-plone.i18n==4.0.6
-plone.indexer==1.0.7
-plone.intelligenttext==3.1.0
-plone.jsonserializer==0.9.10
-plone.keyring==3.1.3
-plone.locking==2.2.4
-plone.memoize==2.1.0
-plone.mockup==1.0
-plone.namedfile==5.4.0
-plone.outputfilters==4.0.2
-plone.portlet.collection==4.0.0a2
-plone.portlet.static==4.0.0a1
-plone.portlets==2.3.2
-plone.protect==4.1.6
-plone.recipe.alltests==1.5.2
-plone.recipe.command==1.1
-plone.recipe.precompiler==0.7.2
-plone.recipe.zeoserver==2.0.3
-plone.recipe.zope2instance==6.10.0
-plone.registry==1.2.1
-plone.releaser==1.8.3
-plone.reload==3.0.1
-plone.resource==2.1.4
-plone.resourceeditor==3.0.3
-plone.rest==1.6.2
-plone.restapi==7.3.5
-plone.rfc822==2.0.2
-plone.scale==3.1.2
-plone.schema==1.3.0
-plone.schemaeditor==3.0.2
-plone.session==3.7.5
-plone.staticresources==2.0.0a1
-plone.stringinterp==1.3.3
-plone.subrequest==1.9.3
-plone.supermodel==1.6.3
-plone.synchronize==1.0.4
-plone.testing==8.0.3
-plone.theme==3.0.7
-plone.tiles==2.3.0
-plone.transformchain==2.0.2
-plone.uuid==1.0.6
-plone.versioncheck==1.7.0
-plone.z3cform==2.0.0a1
-plonetheme.barceloneta==3.0.0a2
-plonetheme.sunburst==1.5.5
-pluggy==0.13.1
-ply==3.11
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-py==1.10.0
-pycparser==2.20
-pyjwt==1.7.1
-pyparsing==2.4.7
-pyrepl==0.9.0
-pyroma==2.6
-pyrsistent==0.17.3
-pyscss==1.3.7
-python-dateutil==2.8.1
-python-dotenv==0.15.0
-python-gettext==4.0
-pytz==2021.1
-readme-renderer==28.0
-repoze.sphinx.autointerface==0.8
-repoze.xmliter==0.6
-requests==2.25.1
-requests-toolbelt==0.9.1
-rfc3986==1.4.0
-robotframework==3.1.2
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-robotframework-python3==2.9
-robotframework-ride==1.7.4.1
-robotframework-selenium2library==3.0.0
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-robotsuite==2.2.1
-roman==3.3
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-six==1.15.0
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-toml==0.10.2
-towncrier==19.2.0
-tox==3.21.4
-tqdm==4.56.1
-transaction==3.0.1
-twine==3.2.0
-typing==3.7.4.3
-typing-extensions==3.7.4.3
-unidecode==0.04.1
-urllib3==1.26.3
-virtualenv==20.4.2
-wadllib==1.3.4
-waitress==1.4.4
-wcwidth==0.2.5
-webencodings==0.5.1
-wheel==0.36.2
-wmctrl==0.3
-wrapt==1.12.1
-z3c.autoinclude==0.4.1
-z3c.batching==2.2
-z3c.blobfile==0.1.5
-z3c.caching==2.2
-z3c.checkversions==1.2
-z3c.dependencychecker==2.7
-z3c.form==3.7.1
-z3c.formwidget.query==0.17
-z3c.jbot==1.1.0
-z3c.objpath==1.2
-z3c.pt==3.3.0
-z3c.relationfield==0.9.0
-z3c.template==3.1.0
-z3c.unconfigure==1.1
-z3c.zcmlhook==1.0b1
-zExceptions==4.1
-zc.buildout==3.0.0b2
-zc.lockfile==2.0
-zc.recipe.egg==2.0.7
-zc.recipe.testrunner==2.2
-zc.relation==1.1.post2
-zc.relationship==2.0.post1
-zc.sourcefactory==1.1
-zdaemon==4.3
-zest.pocompile==1.5.0
-zest.releaser==6.22.1
-zestreleaser.towncrier==1.2.0
-zipp==3.4.0
-zodbpickle==2.0.0
-zodbupdate==1.5
-zodbverify==1.1.0
-zope.annotation==4.7.0
-zope.app.intid==3.7.1
-zope.app.locales==4.1
-zope.browser==2.3
-zope.browsermenu==4.4
-zope.browserpage==4.4.0
-zope.browserresource==4.4
-zope.cachedescriptors==4.3.1
-zope.component==4.6.2
-zope.componentvocabulary==2.2.0
-zope.configuration==4.4.0
-zope.container==4.4.0
-zope.contentprovider==4.2.1
-zope.contenttype==4.5.0
-zope.copy==4.2
-zope.copypastemove==4.1.0
-zope.datetime==4.2.0
-zope.deferredimport==4.3.1
-zope.deprecation==4.4.0
-zope.dottedname==4.3
-zope.dublincore==4.2.0
-zope.event==4.5.0
-zope.exceptions==4.4
-zope.filerepresentation==5.0.0
-zope.formlib==4.7.1
-zope.globalrequest==1.5
-zope.hookable==5.0.1
-zope.i18n==4.7.0
-zope.i18nmessageid==5.0.1
-zope.interface==5.1.1
-zope.intid==4.3.0
-zope.keyreference==4.2.0
-zope.lifecycleevent==4.3.0
-zope.location==4.2
-zope.mkzeoinstance==4.1
-zope.pagetemplate==4.5.0
-zope.password==4.3.1
-zope.processlifetime==2.3.0
-zope.proxy==4.3.5
-zope.ptresource==4.2.0
-zope.publisher==6.0.0
-zope.ramcache==2.3
-zope.schema==6.1.0
-zope.security==5.1.1
-zope.sendmail==5.2
-zope.sequencesort==4.1.2
-zope.site==4.4.0
-zope.size==4.3
-zope.structuredtext==4.3
-zope.tal==4.4
-zope.tales==5.1
-zope.testbrowser==5.5.1
-zope.testing==4.9
-zope.testrunner==5.2
-zope.traversing==4.4.1
-zope.viewlet==4.2.1