fix: removed the redundant tests collection github workflow (#29363)

.github/workflows/unit-tests-check.yml

@@ -1,57 +0,0 @@
-name: Unit tests
-
-on:
-  pull_request:
-    branches:
-      - master
-
-jobs:
-  run_tests:
-    name: Ensure Unit Tests Running
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        python-version: ['3.8']
-        include:
-          - os: ubuntu-20.04
-            path: ~/.cache/pip
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: setup python
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
-
-    - name: Install Required Packages
-      run: |
-        sudo apt-get update && sudo apt-get install libxmlsec1-dev
-        sudo systemctl start mongod
-
-    - name: Get pip cache dir
-      id: pip-cache-dir
-      run: |
-        echo "::set-output name=dir::$(pip cache dir)"
-
-    - name: Cache pip dependencies
-      id: cache-dependencies
-      uses: actions/cache@v2
-      with:
-        path: ${{ steps.pip-cache-dir.outputs.dir }}
-        key: ${{ runner.os }}-pip-${{ hashFiles('requirements/edx/testing.txt') }}
-        restore-keys: ${{ runner.os }}-pip-
-
-
-    - name: Install Python Dependencies
-      if: steps.cache-dependencies.output.cache-hit != 'true'
-      run: |
-        pip install setuptools wheel
-        pip install -r requirements/edx/testing.txt
-
-    - name: Install Django
-      run: pip install -r requirements/edx/django.txt
-
-    - name: Collect Tests
-      env:
-        STUDIO_CFG: lms/envs/bok_choy.yml
-      run: for dir in $(find . -name "pytest.ini" -exec dirname {} \;); do pytest --collect-only $dir; done