[Reformer] Move model card to google model (#4113)

* correct model card

* remove model card from patrick von platen

model_cards/patrickvonplaten/reformer-crime-and-punish/README.md → model_cards/google/reformer-crime-and-punishment/README.md

@@ -3,9 +3,8 @@ Crime and Punishment text was taken from `gs://trax-ml/reformer/crime-and-punish
 Model was trained in flax using colab notebook proposed by authors: https://colab.research.google.com/github/google/trax/blob/master/trax/models/reformer/text_generation.ipynb
 Weights were converted to Hugging Face PyTorch `ReformerModelWithLMHead`.
 
-Model is used as a proof of concept that the forward pass works for a `ReformerModelWithLMHead`.
-Given that the model was trained only for 30mins on a ~0.5M tokens dataset and has only 320 tokens, 
-the generation results are reasonable:
+The model is a character level language model. Language from in `crime-and-punishment` style 
+can be generated as follows:
 
 ```python
 model = ReformerModelWithLMHead.from_pretrained("patrickvonplaten/reformer-crime-and-punish")