.github: clean up code ownership

Author: paulfantom

.github/CODEOWNERS

@@ -8,7 +8,8 @@ go.mod @timescale/o11y-applications
 go.sum @timescale/o11y-applications
 
 # CI system and repository configuration
-.github/ @timescale/o11y-applications @timescale/o11y-services
+.github/ @timescale/o11y-applications
+.github/workflows/mixin.yml @timescale/o11y-services
 
 # Go packages
 /pkg/api @antekresic @Harkishen-Singh
@@ -20,6 +21,3 @@ go.sum @timescale/o11y-applications
 /pkg/tests/upgrade_tests/ @timescale/o11y-data-platform
 
 /docs/mixin @timescale/o11y-services
-
-# helm and kubernetes related parts
-/deploy @timescale/o11y-services @cevian

.github/renovate.json

@@ -20,12 +20,6 @@
       "datasourceTemplate": "github-tags",
       "depNameTemplate": "golangci/golangci-lint"
     },
-    {
-      "fileMatch": ["^\\.github\\/workflows\\/[^/]+\\.ya?ml$"],
-      "matchStrings": ["helm-version:\\s(?<currentValue>.*?)\\n"],
-      "datasourceTemplate": "github-tags",
-      "depNameTemplate": "helm/helm"
-    },
     {
       "fileMatch": ["^\\.github\\/workflows\\/[^/]+\\.ya?ml$"],
       "matchStrings": ["goreleaser-version:\\s(?<currentValue>.*?)\\n"],
@@ -40,11 +34,6 @@
     }
   ],
   "packageRules": [
-    {
-      "addLabels": ["helm"],
-      "groupName": "helm charts",
-      "matchManagers": ["helmv3", "helm-values"]
-    },
     {
       "addLabels": ["go"],
       "groupName": "golang dependencies",