Update upcoming_hackathons.yml

Author: DCGenomics

_data/upcoming_hackathons.yml

@@ -3,12 +3,4 @@
   link: https://goo.gl/forms/BijIwPgPo7nhtdG03
   community:
 
-- date: "October 3, 2024"
-  loc: "Pydna Hackathon (cloning / genetic engineering library)"
-  link: https://github.com/BjornFJohansson/pydna/discussions/258
-  community:
 
-- date: "November 4-8, 2024"
-  loc: "ELIXIR Biohackathon"
-  link: "https://elixir-europe.org/events/biohackathon-europe"
-  community: