ANLI data distribution makes it hard to create internal dev - so it's temporarily ignored

[denizbeser]

If you look at the original dev data, you will see every datapoint is distinct. Training data set, however, has a lot of repetitions. This makes it infeasible to do a 90-10-10 split.

Potential solutions:

1. one reasonable thing to do would be to (a) separate in a "not overlapping" dev and set up a cross-fold validation experiment
2. using a fraction of the original dev as internal dev for Anli