What is the best acne scar removing cream?

No such cream: Acne scar varies a lot from ice pick to rolling scars. They can not be removed by any cream. Tretinoin helps with laser treatment.

Probably none: Various treatments can be used to treat acne scarring. Retina type creams might offer some improvement, but this will likely be minimal. Selection of treatment depends on various factors, including the type of scar, location, your skin type & other factors. Treatments include microdermabrasion, dermabrasion, fillers, surgical subcision, and lasers such as fraxel and fractionated co2 resurfacing.