Revert "Add Stop COVID-19 hackathon (#510)" (#511)
Revert "Add Stop COVID-19 hackathon (#510)" (#511)

This reverts commit 091aeaed1f748dd5d1c34f422aee2387a7069184.
Hackalist/Hackalist.github.io,Hackalist/Hackalist.github.io,KevinPayravi/Hackalist.github.io,KevinPayravi/Hackalist.github.io