chore: remove patching

Previously there has been a patch to modify
front matter in Docusaurus v2, but with migration
to Docusaurus v3, this has been moved to a config
file and patching is not necessary anymore.
The patch itself has been removed from the codebase,
but I noticed there are leftovers in form of a dependency
and a postinstall script.

Author: honzajavorek

package-lock.json

@@ -26,7 +26,6 @@
         "swizzle": "docusaurus swizzle",
         "deploy": "rimraf .docusaurus && docusaurus deploy",
         "docusaurus": "docusaurus",
-        "postinstall": "patch-package",
         "lint": "npm run lint:md && npm run lint:code",
         "lint:fix": "npm run lint:md:fix && npm run lint:code:fix",
         "lint:md": "markdownlint '**/*.md'",
@@ -51,7 +50,6 @@
         "globby": "^14.0.0",
         "markdownlint": "^0.35.0",
         "markdownlint-cli": "^0.41.0",
-        "patch-package": "^8.0.0",
         "path-browserify": "^1.0.1",
         "rimraf": "^6.0.0",
         "typescript": "^5.1.3"