lib/locale.t: Remove tests that need UTF-8 locale

These tests should not be here because they will only match under a
UTF-8 locale, which happens to be the case on the machine I developed
them on, but not necessarily always true, and so they are failing.

Given the deadline is already past, I'm just removing them for now, and
will re-add them later in another place in the file where we know we
are using a UTF-8 locale.