cicd: Revert to default dependency

.github/dependabot.yml

@@ -1,9 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "gomod"
-    directory: "/"
-    schedule:
-      interval: "daily"
-    pull-request-branch-name:
-      # The default / breaks artifact names at archive time.
-      separator: "-"