Update README.md

Author: clint (woonhyuk baek)

README.md

@@ -190,8 +190,6 @@ While Open Source software may be free to use, that does not mean it is free of
 ## References
 
 [1] [HyperCLOVA](https://arxiv.org/abs/2109.04650): Kim, Boseop, et al. "What changes can large-scale language models bring? intensive study on hyperclova: Billions-scale korean generative pretrained transformers." arXiv preprint arXiv:2109.04650 (2021).   
-[2] [SKT-AI/KoGPT-2 2.0](https://github.com/SKT-AI/KoGPT2): "SKT-AI/KoGPT2: Korean GPT-2 pretrained cased (KoGPT2)." https://github.com/SKT-AI/KoGPT2 (2021).   
-[3] [SKT-AI/KoGPT-2 Trinity](https://huggingface.co/skt/ko-gpt-trinity-1.2B-v0.5): "Ko-GPT-Trinity 1.2B." https://huggingface.co/skt/ko-gpt-trinity-1.2B-v0.5 (2021).
 
 
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