README: drop affiliations from authors line

README.md

@@ -31,7 +31,7 @@ Multimodal trajectories of human and Stretch-robot motion paired with task and m
 - **Paper:** [MotIF: Motion Instruction Fine-tuning](https://arxiv.org/abs/2409.10683) (arXiv:2409.10683)
 - **Project website:** https://motif-1k.github.io
 - **Code (GitHub):** https://github.com/Minyoung1005/motif
-- **Authors:** Minyoung Hwang (MIT), Joey Hejna (Stanford), Dorsa Sadigh (Stanford), Yonatan Bisk (CMU)
+- **Authors:** Minyoung Hwang, Joey Hejna, Dorsa Sadigh, Yonatan Bisk
 - **Contact:** myhwang@mit.edu
 
 ## Abstract