Move old finetuning script into the new folder

examples/lm_finetuning/simple_lm_finetuning.py

@@ -33,9 +33,6 @@ from pytorch_pretrained_bert.modeling import BertForPreTraining
 from pytorch_pretrained_bert.tokenization import BertTokenizer
 from pytorch_pretrained_bert.optimization import BertAdam, warmup_linear
 
-from torch.utils.data import Dataset
-import random
-
 logging.basicConfig(format='%(asctime)s - %(levelname)s - %(name)s -   %(message)s',
                     datefmt='%m/%d/%Y %H:%M:%S',
                     level=logging.INFO)