chore: drop inapplicable dependabot ecosystems (#2)

ghibli-gallery-crawler/.github/dependabot.yml

@@ -1,19 +1,2 @@
 version: 2
-updates:
-  - package-ecosystem: "npm"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    open-pull-requests-limit: 10
-    groups:
-      minor-and-patch:
-        update-types: ["minor", "patch"]
-      security:
-        applies-to: security-updates
-        patterns: ["*"]
-    versioning-strategy: increase
-    labels: ["dependencies", "security"]
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "monthly"
+updates: []