MaintainResult::panic_on_timeout() doesn't seem to do anything

[casey]

I was curious what MaintainResult::panic_on_timeout was doing, so I checkout out the code.

However, it seems to be empty:

impl MaintainResult {
    /// Panics if the MaintainResult is not Ok.
    pub fn panic_on_timeout(self) {
        let _ = self;
    }
}

It looks like PR #5012 changes this. However, in the mean time, I would suggest adding a comment to this function explaining what's going on, since while digging in and trying to understand how things work, I found it pretty confusing.

[Wumpf]

might as well just remove it in the meantime given that it's always doing the wrong thing Oo