Deprecation: #79560 - Deprecate ClientUtility::getDeviceType 

See forge#79560

Description 

The method \TYPO3\CMS\Core\Utility\ClientUtility::getDeviceType is not used and completely outdated and has been marked as deprecated.

Impact 

Calling \TYPO3\CMS\Core\Utility\ClientUtility::getDeviceType method will trigger a deprecation log entry. Code using this method will work until it is removed in TYPO3 v9.

Affected Installations 

Any installation using the mentioned method \TYPO3\CMS\Core\Utility\ClientUtility::getDeviceType.