Update VS Code debug configuration

Created by: auchenberg

Update VS Code debug configuration to reflect new default values in the VS Code Chrome debugger.

packages/react-scripts/template/README.md

@@ -262,7 +262,6 @@ Then add the block below to your `launch.json` file and put it inside the `.vsco
     "request": "launch",
     "url": "http://localhost:3000",
     "webRoot": "${workspaceRoot}/src",
-    "userDataDir": "${workspaceRoot}/.vscode/chrome",
     "sourceMapPathOverrides": {
       "webpack:///src/*": "${webRoot}/*"
     }