Drop `msgspec` specific CI jobs

.github/workflows/ci.yml

@@ -76,35 +76,6 @@ jobs:
       - name: Run tests
         run: pytest tests/ --spawn-backend=${{ matrix.spawn_backend }} -rs
 
-  testing-linux-msgspec:
-    # runs jobs on all OS's but with optional `msgspec` dep installed
-    name: '${{ matrix.os }} Python ${{ matrix.python }} - ${{ matrix.spawn_backend }} - msgspec'
-    timeout-minutes: 10
-    runs-on: ${{ matrix.os }}
-
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest]
-        python: ['3.9', '3.10']
-        spawn_backend: ['trio', 'mp']
-
-    steps:
-
-      - name: Checkout
-        uses: actions/checkout@v2
-
-      - name: Setup python
-        uses: actions/setup-python@v2
-        with:
-          python-version: '${{ matrix.python }}'
-
-      - name: Install dependencies
-        run: pip install -U .[msgspec] -r requirements-test.txt -r requirements-docs.txt --upgrade-strategy eager
-
-      - name: Run tests
-        run: pytest tests/ --spawn-backend=${{ matrix.spawn_backend }} -rs
-
   # We skip 3.10 on windows for now due to
   # https://github.com/pytest-dev/pytest/issues/8733
   # some kinda weird `pyreadline` issue..