Fix #171: Simplify GitHub CI configuration

.github/workflows/ci.yml

@@ -15,20 +15,6 @@ on:
 
 
 jobs:
-
-  pre_job:
-    runs-on: ubuntu-latest
-    # Map a step output to a job output
-    outputs:
-      should_skip: ${{ steps.skip_check.outputs.should_skip }}
-    steps:
-      - id: skip_check
-        uses: fkirc/skip-duplicate-actions@master
-        with:
-          github_token: ${{ github.token }}
-          paths_ignore: '["CHANGES/**", "CHANGES.rst", "LICENSE.txt", "README.rst", "tools/**"]'
-        if: github.event_name != 'push' || contains(github.ref, 'refs/tags/')
-
   lint:
     name: Linter
     runs-on: ubuntu-latest
@@ -89,8 +75,7 @@ jobs:
 
   test:
     name: Test
-    needs: [lint, pre_job]
-    if: needs.pre_job.outputs.should_skip == 'false'
+    needs: [lint]
     strategy:
       matrix:
         pyver: [3.6, 3.7, 3.8, 3.9]
@@ -158,9 +143,8 @@ jobs:
 
   test-summary:
     name: Test matrix status
-    if: needs.pre_job.outputs.should_skip == 'false' && always()
     runs-on: ubuntu-latest
-    needs: [pre_job, test]
+    needs: [test]
     steps:
       - name: Check build matrix status
         if: needs.test.result != 'success'