Remove redundant dependencies in favor of the postinstall script

Author: DmitrySharabin

package-lock.json

@@ -4,8 +4,7 @@
 	"description": "Prism website",
 	"type": "module",
 	"scripts": {
-		"postinstall": "node _build/copy-plugins.mjs",
-		"dependencies": "npm install --prefix node_modules/prismjs",
+		"postinstall": "node _build/postinstall.mjs",
 		"dev": "netlify dev -p 8844",
 		"serve": "npx @11ty/eleventy --config=_build/eleventy.js --serve --quiet",
 		"build:html": "npx @11ty/eleventy --config=_build/eleventy.js --quiet",
@@ -25,7 +24,6 @@
 	"license": "MIT",
 	"devDependencies": {
 		"@11ty/eleventy": "^3.1.0",
-		"@11ty/eleventy-fetch": "^5.0.2",
 		"eleventy-plugin-toc": "^1.1.5",
 		"markdown-it-anchor": "^9.2.0",
 		"markdown-it-attrs": "^4.3.1",
@@ -34,7 +32,6 @@
 		"prettier-plugin-brace-style": "^0.7.3",
 		"prettier-plugin-merge": "^0.7.4",
 		"prettier-plugin-space-before-function-paren": "^0.0.8",
-		"prismjs": "github:PrismJS/prism#v2",
 		"typedoc": "^0.28.5",
 		"typedoc-plugin-rename-defaults": "^0.7.3"
 	}