chore: drop a stray lockfile marker

A local `npm install` (needed to pick up main's new `postal-mime`) wrote
`"extraneous": true` onto a bundled `@clack/prompts` dependency. It was the
branch's only lockfile change and it does not belong to this PR.

package-lock.json

@@ -1216,7 +1216,6 @@
     },
     "node_modules/@clack/prompts/node_modules/is-unicode-supported": {
       "version": "1.3.0",
-      "extraneous": true,
       "inBundle": true,
       "license": "MIT",
       "engines": {