Can vinegar remove folliculitis scars?

No: Nothing can remove a scar except surgery. Even then except with plastic surgery techniques the scar is likely to reform.

Forever but better: When our bodies sustain an injury, the immediate response is inflammation (red, hot, tender swelling). This is the body increasing the blood flow and bringing healing factors to the area and also the veins expand to carry bad stuff away. As healing occurs, new tissues fill in that are different than normal and less elastic. This is a scar. Over time it will fade in color but always be there.