Remove non-functional dependabot config

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.github/dependabot.yml

@@ -1,17 +0,0 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
-version: 2
-updates:
-  # Enable version updates for Helm
-  - package-ecosystem: "helm"
-    # Look for a `Chart.yaml` in the `root` directory
-    directory: '/homeassistant'
-    # Check for updates once a week
-    schedule:
-      interval: "daily"
-  - package-ecosystem: "docker"
-    directory: '/homeassistant'
-    schedule:
-      interval: "daily"