They didn’t, but the police force stopped enforcing those laws, generally in response to defunding or threats of defunding.
The police forces in these cities are in the majority comprised of individuals who live outside of the city and commute to perform enforcement in an area they don’t want to live in.
This is the difference that never translated between the Black Lives Matter and Blue Lives Matter/Thin Blue Line groups: in one, in the majority the enforcers are not and have never been part of the community. In the other, the deputy’s kids go to your elementary school and they volunteer at the pancake breakfast.