Delete Visual Studio user files (#4999)

This file is a user-specific configuration file for setting up debug
options when using Visual Studio's CMake integration. It shouldn't be
part of the repository.

.vs/launch.vs.json

@@ -1,14 +0,0 @@
-{
-  "version": "0.2.1",
-  "defaults": {},
-  "configurations": [
-    {
-      "args": [ "-T", "ps_6_0", "abs1.hlsl" ],
-      "currentDir": "${workspaceRoot}\\tools\\clang\\test\\CodeGenHLSL",
-      "name": "dxc",
-      "project": "CMakeLists.txt",
-      "projectTarget": "tools\\clang\\tools\\dxc\\dxc",
-      "type": "default"
-    }
-  ]
-}