ci: remove custom renovate config

renovate.json

@@ -17,16 +17,6 @@
       "bumpVersion": "patch"
     }
   ],
-  "customManagers": [
-    {
-      "fileMatch": ["Chart.yaml$"],
-      "matchStrings": [
-        "#!\\s+renovate:\\s+datasource=(?<datasource>docker)\\s+name:\\s+['\"]?(?<product>[^'\"\\s]+)['\"]?\\s+repository:\\s+['\"]?oci://(?<namespace>[^'\"\\s]+)['\"]?\\s+version:\\s+['\"]?(?<currentValue>[^'\"\\s]+)['\"]?"
-      ],
-      "depNameTemplate": "{{product}}",
-      "packageNameTemplate": "{{namespace}}/{{product}}"
-    }
-  ],
   "ignorePaths": ["charts/*/charts/**"],
   "enabledManagers": ["dockerfile", "helmv3", "helm-values"]
 }