Finish removal of APM mode selection

Just cleaning up the rest of this. The UI was a little weird because the button was gone, but the text was still there.

@LorenzMeier I spoke with the APM Planner folks. They are not doing any sort of big merges across any more. They only cherry pick once and a while. Also the APM Planner branch has diverged quite a bit so trying to keep the two in sync is very difficult and not going to happen. Given the discussion I think we're ok to start disconnecting the APM specific UI and leave APM to be a mavlink only case. Although I still think there are some problems there as well. But those might be fixable.
Oops. That’s what I get for going fast. I’ll fix.

On Aug 31, 2014, at 11:56 AM, Lorenz Meier <notifications@github.com> wrote:

> In src/ui/main/QGCViewModeSelection.cc:
> 
> > @@ -48,10 +44,4 @@ void QGCViewModeSelection::selectPX4() {
> >      emit customViewModeSelected(MainWindow::CUSTOM_MODE_PX4);
> >      mode = MainWindow::CUSTOM_MODE_PX4;
> >      selected = true;
> > -}
> > -
> > -void QGCViewModeSelection::selectAPM() {
> > -    emit customViewModeSelected(MainWindow::CUSTOM_MODE_APM);
> > -    mode = MainWindow::CUSTOM_MODE_APM;
> > -    selected = true;
> > -}
> > +}
> newline missing at end of file.
> 
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