the ezcontentobject::removeThis() has a block of code that is not used.

the block in question is an "else if(){}" that starts here:
https://github.com/ezsystems/ezpublish-legacy/blob/master/kernel/classes/ezcontentobject.php#L1979
there is even buggy code inside, but it's never used. there is not a single call of removeThis() with a nodeId parameter.

this code throws warnings in some IDEs about the unistantiated var $additionalNodes.

the whole block should be removed.