Remove legacy launch settings (#15511)

.vscode/launch.json

@@ -1,22 +0,0 @@
-{
-    // Use IntelliSense to learn about possible attributes.
-    // Hover to view descriptions of existing attributes.
-    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-    "version": "0.2.0",
-    "configurations": [
-        {
-            "name": "Debug with Comet",
-            "type": "comet",
-            "request": "launch",
-            "preLaunchTask": "comet: Build"
-        },
-        {
-            "name": "Debug with Xamarin",
-            "type": "mono",
-            "request": "attach",
-            "address": "localhost",
-            "port": 10000,  
-            "preLaunchTask": "Run Sample"
-        },
-    ]
-}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "dotnet.defaultSolution": "Microsoft.Maui-dev.sln"
+}