Disable dependabot. There is no simple way to disable it.

Keep the file just in case.

.github/dependabot.yml

@@ -10,6 +10,8 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+    ignore:
+      - dependency-name: "*"
     reviewers:
       - "vector-im/element-x-android-reviewers"
   # Updates for Gradle dependencies used in the app
@@ -18,5 +20,7 @@ updates:
     schedule:
       interval: "daily"
     open-pull-requests-limit: 200
+    ignore:
+      - dependency-name: "*"
     reviewers:
       - "vector-im/element-x-android-reviewers"