Disabling a HIT is probably not what you want to do. DisableHIT automatically removes the HIT from the MTurk server, approves (and thus pays for) all submitted and pending assignments, and then permanently deletes all assignment data.
A dataframe containing a list of HITs and whether the request to disable each of them was valid.
Details
Disable a HIT (and its assignment data). This is a somewhat risky function because it automatically approves all pending assignments and then disposes of everything. DisposeHIT is probably what most users will use to delete HIT and assignment data that is no longer needed.