Removed unnecessary text (#7)

- Removed unnecessary text (1dcc93ea8fd7552a957b8700644c218ebb6cdb1c)


Co-authored-by: kapllan <kapllan@users.noreply.huggingface.co>

README.md

@@ -160,7 +160,7 @@ Google TPU v3-8
 
 pytorch, transformers.
 
-## Citation [optional]
+## Citation
 
 ```
 @misc{rasiah2023scale,