TYPO3 Core

A quick search on "not used" and something like "anymore" or "anywhere" gave me:

typo3/sysext/wizard_sortpages/Classes/View/SortPagesWizardModuleFunction.php: * Adds menu items... but I think this is not used at all. Looks very much like some testing code. If anyone cares to check it we can remove it some day...
typo3/sysext/rtehtmlarea/Classes/RteHtmlAreaBase.php: * @param boolean $concatenate Not used anymore
typo3/sysext/frontend/Classes/Page/PageRepository.php: * @param integer The expiration time (not used anymore)
typo3/sysext/core/Classes/TypoScript/ExtendedTemplateService.php: * @param array (not used anymore)
typo3/sysext/core/Classes/Utility/GeneralUtility.php: * @param string $checkPrefix Not used anymore since 6.0
typo3/sysext/core/Classes/Utility/GeneralUtility.php: * @param string $checkPrefix Not used anymore since 6.0
typo3/sysext/core/Classes/Utility/GeneralUtility.php: * @param boolean $silent Not used anymore since 6.0
typo3/sysext/wizard_crpages/Classes/Controller/CreatePagesWizardModuleFunctionController.php: * Adds menu items... but I think this is not used at all. Looks very much like some testing code. If anyone cares to check it we can remove it some day...
typo3/sysext/indexed_search/Classes/Indexer.php: * NOT USED anywhere inside this class!
typo3/sysext/backend/Classes/RecordList/AbstractRecordList.php: // OBSOLETE - NOT USED ANYMORE. leftMargin
typo3/sysext/backend/Classes/RecordList/AbstractRecordList.php: * @param integer OBSOLETE - NOT USED ANYMORE. $lMargin is the leftMargin (integer)
typo3/sysext/backend/Classes/Form/FormEngine.php: * (Not used anywhere...?)
typo3/sysext/backend/Classes/Form/FormEngine.php: * (Not used anywhere...?)
typo3/sysext/backend/Classes/Form/FormEngine.php: * Gets default record. Maybe not used anymore. FE-editor?
typo3/sysext/backend/Classes/Utility/BackendUtility.php: * @param string $thumbScript Optional: $thumbScript - not used anymore since FAL

What's the state of this issue?