Remove temporary logic from BindMethods.DispatchEventAsync

[SteveSandersonMS]

From #11791

BindMethods.DispatchEventAsync has a comment saying "this is a temporary polyfill that doesn't do proper error handling and will be removed".

Are we able to remove this now?

[rynowak]

One place this is called from is BindMethods.DispatchEventAsync, which comes with a comment saying "this is a temporary polyfill that doesn't do proper error handling and will be removed". Can this be removed now

Yes, this can be removed along with all of the overloads of SetValueHandler