Remove job-<start/end> from CI

.github/actions/job-end/action.yml

@@ -1,8 +0,0 @@
-name: job-end
-description: "Save a job status"
-
-runs:
-  using: "composite"
-  steps:
-    - run: echo "success" > run_result
-      shell: bash

.github/actions/job-start/action.yml

@@ -1,19 +0,0 @@
-name: job-start
-description: "Setup a job status"
-outputs:
-  run_result:
-    value: ${{ steps.run_result.outputs.run_result }}
-
-runs:
-  using: "composite"
-  steps:
-    - name: Restore the previous run result
-      uses: actions/cache@v2
-      with:
-        path: run_result
-        key: ${{ github.run_id }}-${{ github.job }}
-        restore-keys: ${{ github.run_id }}-${{ github.job }}
-    - name: Set run_result to default or use cached value
-      id: run_result
-      run: echo "::set-output name=run_result::$(cat run_result 2>/dev/null || echo 'default')"
-      shell: bash