[TASK] Remove duplicate XLIFF entry

Resolves: #86135
Releases: master
Change-Id: I2b77b58aeb5bdbd12e9186b1b18d8b82a9dbfe6d
Reviewed-on: https://review.typo3.org/58670
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Willi Wehmeier <wwwehmeier@gmail.com>
Tested-by: Willi Wehmeier <wwwehmeier@gmail.com>
Reviewed-by: Joerg Kummer <typo3@enobe.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Mathias Brodala <mbrodala@pagemachine.de>
Tested-by: Mathias Brodala <mbrodala@pagemachine.de>
Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>

typo3/sysext/backend/Resources/Private/Language/locallang_siteconfiguration.xlf

@@ -69,9 +69,6 @@
 			<trans-unit id="validation.duplicateLanguageId.message">
 				<source>Two language configurations for language "%1s" found. This would be an invalid configuration, the dangling one has been removed.</source>
 			</trans-unit>
-			<trans-unit id="validation.duplicateLanguageId.message">
-				<source>Two language configurations for language "%1s" found. This would be an invalid configuration, the dangling one has been removed.</source>
-			</trans-unit>
 		</body>
 	</file>
 </xliff>