Removes the brittle test configurations
Removes the brittle test configurations

The brittle test configs have experienced changes between
ICU versions, due to the variation in CLDR data. Instead of
adding more (tedious) options for compiling rust_icu, let's
remove the brittle tests.  There are enough of them remaining
to maintain confidence in the wrapper.

Issue: 239

google/rust_icu,google/rust_icu