Remove unnecessary dependencies

package.json

@@ -1,7 +1,7 @@
 {
   "name": "nix-installer-action",
   "version": "1.0.0",
-  "description": "You can use [`nix-installer`](https://github.com/DeterminateSystems/nix-installer) as a Github action:",
+  "description": "You can use [`nix-installer`](https://github.com/DeterminateSystems/nix-installer) as a Github Action:",
   "main": "./dist/main.js",
   "types": "./dist/main.d.ts",
   "type": "module",
@@ -28,9 +28,7 @@
     "@actions/core": "^1.10.1",
     "@actions/exec": "^1.1.1",
     "@actions/github": "^5.1.1",
-    "@actions/tool-cache": "^2.0.1",
     "detsys-ts": "github:DeterminateSystems/detsys-ts",
-    "fetch-retry": "^5.0.6",
     "string-argv": "^0.3.2"
   },
   "devDependencies": {