I'll just copy paste my response from another thread.
Hunter's Potion was not only a noob trap that does little to nothing on anyone but Ornn, but it's also slowing you down and teaching you bad habits.
You see, if you know how to properly kite camps, heck, even decent is enough, you have enough sustain in the jungle to pretty much do with anything, and hell, I do love my usual offmeta junglers. So unless you go full bananas, you're good.
So not being needed unless you're bad is a good reason to remove it, as bad players need to learn to get better, and Hunter's doesn't teach the right things. A guy with Hunter's will not try to learn to kite better because he has the extra sustain, he will not try to learn to conserve his resources because he has the extra sustain, will waste mana and HP when it's not needed.
And once you learn to play in a bad way, it's gonna be hell to learn to play properly. So learning properly from the get go is better.
Removing an item that teaches bad players how be worse at the game should be removed.
And trust me, I speak from my own experience, as I used to love that item when I started LoL and I'm so glad to see it gone.