actions: overbodige testing workflow verwijderd

testing.yml is opgesplitst in frontend-testing.yml en backend-testing.yml

.github/workflows/testing.yml

@@ -1,32 +0,0 @@
-# This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-nodejs
-
-name: Testing
-
-on:
-  push:
-    branches: [ "dev" ]
-  pull_request:
-    branches: [ "dev" ]
-    types: ["synchronize", "ready_for_review", "opened", "reopened"]
-
-jobs:
-  test:
-    name: Run unit tests
-    if: '! github.event.pull_request.draft'
-    runs-on: [self-hosted, Linux, X64]
-
-    strategy:
-      matrix:
-        node-version: [22.x]
-        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v4
-      with:
-        node-version: ${{ matrix.node-version }}
-        cache: 'npm'
-    - run: npm ci
-    - run: npm run test:unit