Breaking: #84148 - RequireJS module for language handling removed

See Issue #84148

Description

Since the removal of ExtJS, the JavaScript files that handled the localization of labels in backend modules became obsolete and have been removed.

Impact

Depending on the RequireJS module TYPO3/CMS/Lang/Lang will result in 404 errors, as the module has been removed.

Affected Installations

Every 3rd party extension depending on TYPO3/CMS/Lang/Lang is affected.

Migration

Remove the module from the affected RequireJS modules. The labels are now prepared by the PageRenderer and passed to TYPO3.lang without the need of additional JavaScript.