build: stop support building addons with VS 2013

PR-URL: #14764
Refs: #14730 (comment)
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: targos

BUILDING.md

@@ -70,9 +70,7 @@ Depending on host platform, the selection of toolchains may vary.
 
 #### Windows
 
-* Building Node: Visual Studio 2015 or Visual C++ Build Tools 2015 or newer
-* Building native add-ons: Visual Studio 2013 or Visual C++ Build Tools 2015
-  or newer
+* Visual Studio 2015 or Visual C++ Build Tools 2015 or newer
 
 ## Building Node.js on supported platforms