remove dependabot

.github/dependabot.yml

@@ -1,15 +0,0 @@
-version: 2
-updates:
-- package-ecosystem: nuget
-  directory: "/"
-  schedule:
-    interval: weekly
-    time: '12:00'
-  open-pull-requests-limit: 10
-
-- package-ecosystem: github-actions
-  directory: '/'
-  schedule:
-    interval: weekly
-    time: '12:00'
-  open-pull-requests-limit: 10