[TASK] Adapt to merged EelUtility in TYPO3.EEL

This removes the EelUtility class from this package as the
generic EelUtility was merged in TYPO3.EEL and can be used
from there now.
Merge pull request #1 from TYPO3-Neos/protected-context

[TASK] Adapt to merged EelUtility in TYPO3.EEL