another warning fix

Author: vince62s

tensor2tensor/bin/t2t-datagen

@@ -43,7 +43,7 @@ from tensor2tensor.data_generators import all_problems  # pylint: disable=unused
 from tensor2tensor.data_generators import audio
 from tensor2tensor.data_generators import generator_utils
 from tensor2tensor.data_generators import snli
-from tensor2tensor.data_generators import wmt
+from tensor2tensor.data_generators import translate
 from tensor2tensor.data_generators import wsj_parsing
 from tensor2tensor.utils import registry
 from tensor2tensor.utils import usr_dir