What technique did early humans use to remove a certain part of bone from the skull to rid a person of evil spirits

trepanning

Explanation: Also known as trepanation, or trepanation, the process of making a hole through the skull to the surface of the brain was done to treat a range of medical conditions or for more mystical reasons.

In ancient times, trepanation was thought to be a treatment for various ailments, such as head injuries. It also has been used to treat pain. Some scientists also think that the practice was used to pull spirits from the body in rituals.  

the first forms of writing came from them in the form of pictographs around 3100 bc.