remove existing check

.github/workflows/daily-dev-bump.yaml

@@ -137,15 +137,11 @@ jobs:
         run: |
           set -x
           # Get 5 most recent branches of closed DartDevtoolWorkflowBot PRs.
-          CLOSED_BRANCH_NAMES=$(gh pr list -A DartDevtoolWorkflowBot -s closed -L 5 --search sort:created-desc | grep auto-bump- | sed 's|.*\(auto-bump-[[:digit:]]*\).*|\1|')
+          CLOSED_BRANCH_NAMES=$(gh pr list -A DartDevtoolWorkflowBot -s closed -L 10 --search sort:created-desc | grep auto-bump- | sed 's|.*\(auto-bump-[[:digit:]]*\).*|\1|')
 
           # Get list of refs(branches) that exist on the remote
-          EXISTING_REFS=$(git ls-remote --heads | grep refs/heads/auto-bump-) 
           for CLOSED_BRANCH in $CLOSED_BRANCH_NAMES; do
-            if echo "$EXISTING_REFS" | grep -q "$CLOSED_BRANCH" ; then
-              # If the branch still exists then we will delete it
-              gh api  /repos/flutter/devtools/git/refs/heads/$CLOSED_BRANCH -X DELETE
-            fi
+            gh api  /repos/flutter/devtools/git/refs/heads/$CLOSED_BRANCH -X DELETE
           done
         env:
           GH_TOKEN: ${{ secrets.DEVTOOLS_WORKFLOW_BOT_TOKEN }}