rm sponsor (#272)

Author: gitsponsored

README.md

@@ -1,7 +1,4 @@
 # FastMOT
-### Sponsor
-Thank you to [Roboflow](https://roboflow.com/?ref=fastMOT) for supporting our work. Over 500,000 developers and machine learning engineers use Roboflow to build and deploy computer vision models.
-
 
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