Remove @types/dompurify.

From what I recall, DOMPurify's type definitions were at that weird
state at first that they continuously broke it for TS users by adding
them to project and removing them again. Plus, they weren't as accurate
as what DefinitelyTyped provided. But things seemed to changed in a way
@types/dompurify is deprecated.

package.json

@@ -49,7 +49,6 @@
     "@reforged/maker-appimage": "^4.0.0",
     "@stylistic/eslint-plugin": "^2.3.0",
     "@tsconfig/strictest": "^2.0.0",
-    "@types/dompurify": "^3.0.1",
     "@types/node": "^20.16.1",
     "@types/semver": "^7.3.9",
     "@types/source-map-support": "^0.5.4",