Build/Test Tools: Do not cancel previous workflow runs.

When a workflow is cancelled, it’s marked as a failure. This is not ideal because the commit attached to the workflow run will appear as though it introduced a problem, but this may not be true.

Because GitHub Actions work a bit differently than Travis builds, it’s unlikely that the same bottleneck will be encountered in workflows.

This change removes all workflow job steps that cancel previous workflows.

See #50401.

git-svn-id: https://develop.svn.wordpress.org/trunk@49168 602fd350-edb4-49c9-b593-d223f7449a82

.github/workflows/javascript-tests.yml

@@ -11,7 +11,6 @@ jobs:
   # Runs the QUnit tests for WordPress.
   #
   # Performs the following steps:
-  # - Cancels all previous workflow runs that have not completed.
   # - Checks out the repository.
   # - Logs debug information about the runner container.
   # - Installs NodeJS 12 (todo: install the version of NPM specified in the `.nvmrc` file to support older branches)
@@ -24,11 +23,6 @@ jobs:
     name: QUnit Tests
     runs-on: ubuntu-latest
     steps:
-      - name: Cancel previous runs of this workflow
-        uses: styfle/cancel-workflow-action@0.5.0
-        with:
-          access_token: ${{ github.token }}
-
       - name: Checkout repository
         uses: actions/checkout@v2