Remove legacy Nextcloud settings (#6050)

.github/renovate.json

@@ -15,12 +15,6 @@
     "data\/web\/inc\/lib\/vendor\/**"
   ],
   "regexManagers": [
-    {
-      "fileMatch": ["^helper-scripts\/nextcloud.sh$"],
-      "matchStrings": [
-        "#\\srenovate:\\sdatasource=(?<datasource>.*?) depName=(?<depName>.*?)( versioning=(?<versioning>.*?))?( extractVersion=(?<extractVersion>.*?))?\\s.*?_VERSION=(?<currentValue>.*)"
-       ]
-    },
     {
       "fileMatch": ["(^|/)Dockerfile[^/]*$"],
       "matchStrings": [