Refactor workflow to consolidate steps and improve readability

.github/workflows/on-commit.yml

@@ -26,37 +26,24 @@ jobs:
           exit 0
         fi
 
-  setup-python:
+  run-main:
     runs-on: ubuntu-latest
-    needs: [fetch-commit-message, check-no-ci]
     steps:
     - uses: actions/checkout@v2
     - name: "Set up Python"
       uses: actions/setup-python@v2
       with:
         python-version: '3.x'
-
-  install-dependencies:
-    runs-on: ubuntu-latest
-    needs: setup-python
-    steps:
-    - uses: actions/checkout@v2
     - name: "Install dependencies"
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
-
-  run-all:
-    runs-on: ubuntu-latest
-    needs: install-dependencies
-    steps:
-    - uses: actions/checkout@v2
     - name: "Run all"
       run: python ./src/runall.py
 
   commit-results:
     runs-on: ubuntu-latest
-    needs: run-all
+    needs: run-main
     steps:
     - uses: actions/checkout@v2
     - name: "Commit results"