Minor change about ARCHIVE_LIST for TF Data2Vec
# What does this PR do?

Just not to declare `DATA2VEC_VISION_PRETRAINED_MODEL_ARCHIVE_LIST` in TF test file.
But I don't mean to introduce it in the model (it was there already in that PR).

As we discussed before, it's better to just drop this variable, and use the checkpoint name directly in `test_model_from_pretrained`. I can change to that, just let me know :-)

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