delete lagacy gh-pages branches

.github/workflows/on commit.yaml

@@ -28,6 +28,16 @@ jobs:
                 git config --global user.email "[email protected]"
                 git config --global --add url.https://github.com/.insteadOf "[email protected]:"
                 
+                for branch in $(git branch -r | grep '^origin/gh-pages/'); do
+                    branch_name=$(echo $branch | sed 's#origin/gh-pages/##')
+                    
+                    if ! git branch -r | grep -q "origin/$branch_name"; then
+                        echo "Deleting legacy remote branch $branch"
+                        git push origin --delete $branch
+                    fi
+                    
+                done
+                
                 branch_name="gh-pages/$(git rev-parse --abbrev-ref HEAD)"
                 git checkout --orphan "$branch_name"
                 mv ".git" "Packing/Reference/0Release/"