[markdown-remark] Remove unused dependencies (#5804)

* [markdown-remark] Remove unused dependency

Follow up to #5785. Missed one dependency that is no longer used and can be removed.

* [markdown-remark] Remove unused dependency

* Lockfile fix

* Update lockfile [again]

packages/markdown/remark/package.json

@@ -29,9 +29,7 @@
   },
   "dependencies": {
     "@astrojs/prism": "^1.0.0",
-    "acorn": "^8.7.1",
     "github-slugger": "^1.4.0",
-    "hast-util-to-html": "^8.0.3",
     "import-meta-resolve": "^2.1.0",
     "rehype-raw": "^6.1.1",
     "rehype-stringify": "^9.0.3",

pnpm-lock.yaml

@@ -3479,11 +3479,9 @@ importers:
       '@types/mdast': ^3.0.10
       '@types/mocha': ^9.1.1
       '@types/unist': ^2.0.6
-      acorn: ^8.7.1
       astro-scripts: workspace:*
       chai: ^4.3.6
       github-slugger: ^1.4.0
-      hast-util-to-html: ^8.0.3
       import-meta-resolve: ^2.1.0
       mocha: ^9.2.2
       rehype-raw: ^6.1.1
@@ -3498,9 +3496,7 @@ importers:
       vfile: ^5.3.2
     dependencies:
       '@astrojs/prism': link:../../astro-prism
-      acorn: 8.8.1
       github-slugger: 1.5.0
-      hast-util-to-html: 8.0.4
       import-meta-resolve: 2.2.1
       rehype-raw: 6.1.1
       rehype-stringify: 9.0.3