Sid Meier's Civilization V

Sid Meier's Civilization V

Create and Discover New Worlds
Maps, Scenarios, Interface, and so much more. Explore the modding world of Civ V, and when you’re ready, download the SDK to create and upload your own.
How to delete technology from tech tree?
For now I figured out how to move things in tech tree and change dependencies but I don't know how to remove it from tree. Needing this for a custom scenario. For example how to remove Future Tech?