remove python 2 tests for circle-ci cc @aaugustin @julien-c @LysandreJik
remove python 2 tests for circle-ci cc @aaugustin @julien-c @LysandreJik

huggingface/transformers,huggingface/transformers,huggingface/pytorch-transformers,huggingface/transformers,huggingface/transformers