"killed" implies it ceased to exist, so I think it's misleading to include rebrandings or relaunches where functionality gets folded into another product.

At a glance...

* Nexus wasn't killed, it was re branded into Pixel. Nexus had been trending toward premium and the Pixel switch cemented that.

* Googles was more-or-less replaced by Lens. Not a pure rebrand, but two products with the same idea.

* Google Now has essentially been folded into the expanding behemoth that is Assistant. I don't care for that kind of feature, but AFAICT they're fairly similar.

* Quickoffice was an acquisition that was promptly folded into Docs/Sheets/etc.