As far as my own testing showed, the option never worked on Android, only iPhone. On Chrome for Android, the Fullscreen API is supported, which is a much better solution. You should start using this feature if you are not already ('Request Fullscreen' in the Browser object). Chrome is steadily replacing the stock browser on Android, and it's just a waiting game before it's the vast majority of Android devices. I don't know what more we could do for Android.
iOS 7 removed the ability to hide the address bar, and the vast majority of iOS users are on the latest version - Apple are generally very good with getting everyone on to the latest version quickly. According to Apple's stats 82% of devices use iOS 7 and this number has increased about 3% in the past month, so soon enough it will be nearly universal, which to me would seem to make iOS 6 on the cusp of irrelevance if it is not already (notwithstanding fussy publishers).
iOS 7.1 is due out in a month and supports the new minimal-ui directive. This is not as good as the fullscreen API in Chrome, but is a big improvement on iOS 7.0's restrictions. Soon enough after launch I would imagine the majority of iOS devices would be updated, and then the problem is solved for the majority, rather than a rapidly disappearing minority.
Can you then provide us with the code for it? Main reason why I use Construct2 is to not deal and learn JS. Just scrollTo(0,1) was all you were doing? Nothing else?
Then I see totally no reason to remove it and just let it be since some people actually use construct2 to make games.
I honestly have nothing more to say on this topic as all Im seeing is that whatever was in 146 worked perfectly for all clients and no one complained (except this funny minimal-ui on ios7).
By now im exhausted with trying to explain to you reasoning of boostermedia, spilgames and other companies that actually matter in html5 world and are shaping landscape of games.