Fix EZP-22128: Update Copyright info in extension.xml

(cherry picked from commit 4ac0246a1956c068f8f1db3320a558c8a7c89f99)
Fix EZP-22128: Remove ezinfo.php, extension.xml replaced it some years ago

(cherry picked from commit 5f1eef1ef0c2f739a8db73eb9dd191caf283166f)