chore: fix error in .vscode/settings.json (#6977)

The `overrideConfigFile` setting doesn't support template strings, so
VSCode was trying to look for a directory litterally named
`${workspaceFolder}` and failed.

This commit removes the setting entirely since it wasn't really needed as
VSCode would default to look for `eslint.config.mjs` (amongst other
variants) in the root directory eventually (traversing the directory
structure up). The important fix in the commit where this config option
was added was `workingDirectories`, which we keep.

Author: watson

.vscode/settings.json

@@ -1,9 +1,4 @@
 {
-  "eslint.workingDirectories": [
-    "."
-  ],
-  "eslint.options": {
-    "overrideConfigFile": "${workspaceFolder}/eslint.config.mjs"
-  },
+  "eslint.workingDirectories": ["."],
   "typescript.tsdk": "node_modules/typescript/lib"
 }