[skip ci] cleanup renovate config

renovate.json

@@ -1,13 +1,4 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["github>thegeeklab/renovate-presets:docker"],
-  "packageRules": [
-    {
-      "datasources": ["github-releases"],
-      "paths": ["Dockerfile"],
-      "groupName": "docker helper tools",
-      "packagePatterns": ["^hairyhenderson", "^aptible", "^thegeeklab"],
-      "automerge": true
-    }
-  ]
+  "extends": ["github>thegeeklab/renovate-presets:docker"]
 }