use built in run cancellation

Author: blink1073

.github/workflows/check-release.yml

@@ -5,6 +5,10 @@ on:
   pull_request:
     branches: ["*"]
 
+concurrency:
+  group: check-release-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: write
 

.github/workflows/downstream.yml

@@ -6,6 +6,10 @@ on:
   pull_request:
     branches: "*"
 
+concurrency:
+  group: downstream-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   tests:
     runs-on: ubuntu-latest

.github/workflows/enforce-label.yml

@@ -1,5 +1,9 @@
 name: Enforce PR label
 
+concurrency:
+  group: label-${{ github.ref }}
+  cancel-in-progress: true
+
 on:
   pull_request:
     types: [labeled, unlabeled, opened, edited, synchronize]

.github/workflows/main.yml

@@ -4,30 +4,16 @@ on:
   push:
   pull_request:
 
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
-  check_duplicate_runs:
-    name: Check for duplicate runs
-    continue-on-error: true
-    runs-on: ubuntu-latest
-    outputs:
-      should_skip: ${{ steps.skip_check.outputs.should_skip }}
-    steps:
-      - id: skip_check
-        uses: fkirc/skip-duplicate-actions@master
-        with:
-          concurrent_skipping: always
-          cancel_others: true
-          skip_after_successful_duplicate: true
-          paths_ignore: '["**/README.md", "**/CHANGELOG.md", "**/COPYING.md"]'
-          do_not_skip: '["pull_request"]'
 
   # Run "pre-commit run --all-files"
   pre-commit:
     name: Run pre-commit hook
 
-    needs: check_duplicate_runs
-    if: ${{ needs.check_duplicate_runs.outputs.should_skip != 'true' }}
-
     runs-on: ubuntu-latest
     timeout-minutes: 2
 
@@ -60,9 +46,6 @@ jobs:
   build-n-test-n-coverage:
     name: Build, test and code coverage
 
-    needs: check_duplicate_runs
-    if: ${{ needs.check_duplicate_runs.outputs.should_skip != 'true' }}
-
     runs-on: ${{ matrix.os }}
 
     strategy: