Google IO 2020 cancelled (physical event)

Due to concerns around the coronavirus (COVID-19), and in accordance with health guidance from the [CDC](https://www.cdc.gov/coronavirus/2019-ncov/index.html), [WHO](https://www.who.int/emergencies/diseases/novel-coronavirus-2019), and other health authorities, we have decided to cancel the physical Google I/O event at Shoreline Amphitheatre.