Remove duplicate renovate config (#962)

Author: robert3005

renovate.json

@@ -2,26 +2,5 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "local>spiraldb/renovate-config"
-  ],
-  "packageRules": [
-    {
-      "matchPackagePrefixes": [
-        "arrow",
-        "parquet"
-      ],
-      "groupName": "arrow"
-    },
-    {
-      "matchPackagePrefixes": [
-        "datafusion"
-      ],
-      "groupName": "datafusion"
-    },
-    {
-      "matchPackagePrefixes": [
-        "futures"
-      ],
-      "groupName": "futures"
-    }
   ]
 }