diff --git a/.github/dep-suggests-matrix.json b/.github/dep-suggests-matrix.json
deleted file mode 100644
index c96dbee1..00000000
--- a/.github/dep-suggests-matrix.json
+++ /dev/null
@@ -1 +0,0 @@
-{"package":["covr","DBItest"]}
diff --git a/.github/versions-matrix.json b/.github/versions-matrix.json
deleted file mode 100644
index 5af4434a..00000000
--- a/.github/versions-matrix.json
+++ /dev/null
@@ -1 +0,0 @@
-{"include":[{"os":"macos-latest","r":"4.4"},{"os":"macos-latest","r":"4.3"},{"os":"windows-latest","r":"devel"},{"os":"windows-latest","r":"4.4"},{"os":"windows-latest","r":"4.3"},{"os":"ubuntu-22.04","r":"devel","http-user-agent":"release"},{"os":"ubuntu-22.04","r":"4.4"},{"os":"ubuntu-22.04","r":"4.3"},{"os":"ubuntu-22.04","r":"4.2"},{"os":"ubuntu-22.04","r":"4.1"},{"os":"ubuntu-22.04","r":"4.0"},{"os":"ubuntu-22.04","r":"4.4","covr":"true","desc":"with covr"}]}
diff --git a/.github/workflows/fledge.yaml b/.github/workflows/fledge.yaml
index 6c167c23..5b2131ae 100644
--- a/.github/workflows/fledge.yaml
+++ b/.github/workflows/fledge.yaml
@@ -104,10 +104,14 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          set -x
-          gh pr create --base main --head fledge --fill-first
-          gh workflow run rcc -f ref=$(git rev-parse HEAD)
-          gh pr merge --squash --auto
+          set -ex
+          if [ -n "$(git diff main --numstat)" ]; then
+            gh pr create --base main --head fledge --fill-first
+            gh workflow run rcc -f ref=$(git rev-parse HEAD)
+            gh pr merge --squash --auto
+          else
+            echo "No changes."
+          fi
         shell: bash
 
       - name: Check release