english: Because what happens in a singly-linked list -- this is trying to remove an existing entry from a list -- and there's a difference between if it's the first entry or whether it's an entry in the middle.
non_english: Jer u jednostruko povezanim listama se dešava - ovo pokušava da ukloni postojeći unos sa liste - a postoji razlika u tome da li se radi o prvom unosu ili se radi o unosu u sredini.