Revert "autoar-mime-types: update supported mime types with shared-mime-info"

This reverts commit 4cda32a7.

It gives more problems than it solves. For example docx is a subtype of zip,
which makes autoar report it as supported, when it's not.

So it's better to use the subtypes that autoar supports directly.

https://bugzilla.gnome.org/show_bug.cgi?id=780214