Update upcoming_hackathons.yml

Author: DCGenomics

_data/upcoming_hackathons.yml

@@ -3,22 +3,4 @@
   link: https://goo.gl/forms/BijIwPgPo7nhtdG03
   community:
 
-- date: "July 22-23, 2023"
-  loc: "BOSC CoFest 2023, in Lyon, France"
-  link: https://www.open-bio.org/events/bosc-2023/obf-bosc-collaborationfest-2023/
-  community access:  
-  
-- date: "August 30-September 1, 2023"
-  loc: "Pan-Structural Variant Hackathon in the Cloud"
-  link: https://www.hgsc.bcm.edu/events/hackathon
-  community access:  
-  
-- date: "October 19-21, 2023"
-  loc: "Data Management and Extraction for Large Learning Models at Carnegie Mellon"
-  link: https://www.library.cmu.edu/about/news/2023-08/hackathon-2023
-  community access:  
-  
-- date: "October 30-November 3, 2023"
-  loc: "ELIXIR Biohackathon"
-  link: https://biohackathon-europe.org/
-  community access:  
+