No. This is the platform-specific 'Silverlight' as a native client application development framework. This kind of 'Silverlight' is living for sure, as in 'Silverlight for Windows Phone', or even 'Windows Runtime'.
It was the 'cross-platform RIA web app framework' called 'Silverlight' that we think is dead. still no evidence to deny this.
I guess a better wording could be 'CoreCLR is dead'. And I guess even 'Silverlight for XBox' runs on the full CLR.