rm concurrency limit

Author: akihironitta

.github/workflows/ci_dockers.yml

@@ -17,9 +17,10 @@ on: # Trigger the workflow on push or pull request, but only for the master bran
       - ".github/workflows/events-nightly.yml"
       - "setup.py"
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref }}
-  cancel-in-progress: ${{ ! (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/release/')) }}
+# FIXME
+# concurrency:
+#   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref }}
+#   cancel-in-progress: ${{ ! (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/release/')) }}
 
 jobs:
   build-PL: