Ikea light - what is this for?

[eidolon]

Im just looking to fit a new Ikea light and noticed this thing. Looks like a capacitor or something?
Do I need it? None of my other lights have one. Can I just cut it off? (the cable is way too long so it would be neater if I could cut it off)

https://imgur.com/a/2nvS1n0

 

[eidolon]

I don’t understand why it’s there though, I’ve never come across it on any other light.