remove concurrency skip causing duplicate cancel working against skip…

…-duplicate-actions

.github/workflows/tests.yml

@@ -7,11 +7,12 @@ on:
   - release
   - workflow_dispatch
 
+# handled by skip-duplicate-actions instead with more options
 # cancel the current workflow if another commit was pushed on the same PR or reference
 # uses the GitHub workflow name to avoid collision with other workflows running on the same PR/reference
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
+#concurrency:
+#  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+#  cancel-in-progress: true
 
 jobs:
   # see: https://github.com/fkirc/skip-duplicate-actions