It'll be fine.
The easiest way is to use a hairdryer or heatgun to GENTLY heat the sticker to help soften the adhesive and then peel it off. It'll probably leave behind some residue. Use some tar/glue remover, something like Auto Finesse ObliTARate (lots of other brands and makes of tar remover are available) or if you've not got any of that then a little petrol on a rag and give it a gentle wipe then give the area a really good wash and it should be all sorted.
If you can still see where the edges of the sticker were then a light polish should remove that.
Hope that helps,
Chris