remove_filter should return (bool) something acually removed
|Reported by:||mdawaffe||Owned by:||rob1n|
|Component:||General||Keywords:||plugin api has-patch|
Sometimes it's nice for plugins to be able to conditionally do something depending on whether or not the hook used to have that filter attatched to it.
For example, add the removed filter back to the hook at a different priority.
Marking as 2.2. Feel free to push it back.