remove a file, add an orientation

[Tkizzy]

user interface state is unnecessary, this is left over from before gitignore was updated.

a warning is thrown if the app neither supports all interface orientations nor is "require full screen" enabled. This was the smaller change of the two.

[cclauss]

@Tkizzy I think this can be closed in favor of https://forum.omz-software.com/topic/3744/xcode-template-for-pythonista/57