Yes I see and I don't sat that should be changed but 
removePanZoomBar removes only the panzoombar,
removeAttribution removes only the attribution, 
and removeNavigation removes the navigation and the panzoombar ... 

It's not coherent, what I purpose:
removePanZoomBar removes only the panzoombar,
removeAttribution removes only the attribution, 
removeNavigation removes only the navigation,
staticMap removes the navigation and the panzoombar

I think that more coherent, and it's more flexible!