docs/events.md: Remove the 'Video' bulletpoint

The video for Platform Security Summit 2019 was never published, so the
bulletpoint mentioning the video was removed.

Author: Eduard Kaverinskyi

docs/events.md

@@ -46,8 +46,6 @@ Events that TrenchBoot appeared on.
     + [Slides (part1)](slides/improving_the_security_of_edge_computing_services_fosdem_2020_part1.pdf)
     + [Slides (part2)](slides/fosdem_trenchboot_2020_part2.pdf)
 - Platform Security Summit 2019
-    + Video:
-    [Less-Insecure Network Edge Virtualization with Low Size, Weight and Power](<>)
     + [Slides](slides/Less_Insecure_Network_Edge_Virtualization_with_Low_Size_Weight_and_Power.pdf)
 - Xen Project Developer and Design Summit 2019
     + Video: