Revert "feat(platform): install Renovate Bot"

This reverts commit 6f7b16d2f9.

Probably better to run as a Tekton pipeline instead of a Job

platform/renovate/Chart.yaml

@@ -1,7 +0,0 @@
-apiVersion: v2
-name: renovate
-version: 0.0.0
-dependencies:
-  - name: renovate
-    version: 31.45.0
-    repository: https://docs.renovatebot.com/helm-charts

platform/renovate/values.yaml

@@ -1,17 +0,0 @@
-renovate:
-  cronjob:
-    # schedule: '0 9 1 * *'  # At 09:00 every month
-    schedule: '*/10 * * * *'  # TODO remove after testing
-    suspend: false
-  renovate:
-    # TODO generate token automatically
-    config: |
-      {
-        "platform": "gitea",
-        "endpoint": "http://gitea-http.gitea:3000/api/v1",
-        "token": "TODO-gitea-renovate-token",
-        "autodiscover": "false",
-        "repositories": [
-          "ops/homelab"
-        ]
-      }