Remove deprecated packages (#1732)

package.json

@@ -86,7 +86,6 @@
         "@types/auto-launch": "^5.0.1",
         "@types/counterpart": "^0.18.1",
         "@types/minimist": "^1.2.1",
-        "@types/mkdirp": "^2.0.0",
         "@types/node": "18.19.34",
         "@types/pacote": "^11.1.1",
         "@types/tar": "^6.1.3",
@@ -107,7 +106,6 @@
         "eslint-plugin-import": "^2.25.4",
         "eslint-plugin-matrix-org": "^1.0.0",
         "eslint-plugin-unicorn": "^53.0.0",
-        "find-npm-prefix": "^1.0.2",
         "glob": "^10.0.0",
         "knip": "^5.0.0",
         "matrix-web-i18n": "^3.2.1",