There is one: https://blog.filippo.io/untrusting-an-intermediate-ca-on-os-x/ https://blog.filippo.io/untrusting-an-intermediate-ca-on-os-... (linked from tweet)

There is one: https://blog.filippo.io/untrusting-an-intermediate-ca-on-os-x/ https://blog.filippo.io/untrusting-an-intermediate-ca-on-os-... (linked from tweet) That's OS X, but probably every major trust store can do this.