chore: clean up unnecessary deps

package.json

@@ -30,7 +30,6 @@
     "@11ty/eleventy-plugin-syntaxhighlight": "^5.0.0",
     "@rknightuk/eleventy-plugin-post-graph": "^1.0.6",
     "child_process": "^1.0.2",
-    "clean-css": "^5.3.3",
     "dotenv-flow": "^4.1.0",
     "eleventy-plugin-embed-everything": "^1.18.2",
     "eleventy-plugin-tabler-icons": "^2.3.0",
@@ -42,7 +41,6 @@
     "markdown-it": "^14.0.0",
     "markdown-it-anchor": "^8.4.1",
     "markdown-it-footnote": "^4.0.0",
-    "marked": "^11.1.1",
     "outdent": "^0.8.0",
     "sanitize-html": "^2.11.0",
     "slugify": "^1.6.6",