Breaking: #72334 - Removed utf8 conversion in EXT:recycler

See Issue #72334

Description

The recycler module previously handled conversions of labels to and from UTF-8 in order to send proper UTF-8 encoded data via JavaScript. The TYPO3 backend is running with UTF-8 since TYPO3 4.5.

The logic and the according functions have been removed as they are not needed anymore.

Impact

The following methods have been removed:

RecyclerUtility::getUtf8String()
RecyclerUtility::isNotUtf8Charset()
RecyclerUtility::getCurrentCharset()

Affected Installations

Any TYPO3 instance directly accessing any of the mentioned RecyclerUtility methods above via a custom extension.

Migration

Remove the usages to these methods, and use the strings directly.