Revert "Add automatic updating of github-actions (#5880)" (#5917)

This reverts commit f781b036c830952fc84a85ffa37f2f51328fa0a4.
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index e24ee23..676ac1d 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -287,11 +287,3 @@
     schedule:
       interval: "daily"
     open-pull-requests-limit: 10
-    
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    commit-message:
-      prefix: "[github_actions]"
-    schedule:
-      interval: "daily"
-    open-pull-requests-limit: 10