check if focusutils.js works on remote machine

[aviatesk]

I found in julia-client we don't use ink.Opener.open's remote option at all.
Fortunately we only have one single feature who consumes ink.Opener.onDidOpen emission:

focusutils.js

https://github.com/JunoLab/atom-julia-client/blob/master/lib/ui/focusutils.js#L69-L71

But obviously it's better to be fixed. I guess just using allowremote global instead of remote optional argument might be enough, but not sure.
What do you think on this @pfitzseb ?

[pfitzseb]

I'm 99% sure the remote option is completely unused and could be safely removed.

[aviatesk]

ah yeah I double checked just now, and it's certainly unused anymore.