Ipad can be disabled by editing project.pbxproj.template.
And removing the ,2 from this line:
TARGETED_DEVICE_FAMILY = "1,2";
But how can I disable the setting that makes itunes connect believe I have optimized for 4,7 and 5 inch iphone, so that it requires screenshots for those devices ?
I think he didn't optimise the app for those sizes. so even if he has screenshot, the app will be rejected by the review team if not optimised for those screens.