fix(ci): add .eslintrc.js and remove unused imports

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Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

.eslintrc.js

@@ -0,0 +1,3 @@
+module.exports = {
+  extends: ['@headlamp-k8s/eslint-config'],
+};