build: Do not run `test-python-sdist`

As it is tested in the `Release` job

.github/workflows/build.yml

@@ -171,33 +171,6 @@ jobs:
         run: tox -e py
         working-directory: ./bindings/python
 
-  test-python-sdist:
-    runs-on: ubuntu-20.04
-    name: Testing Python source code distribution
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          submodules: true
-      - uses: actions/setup-python@v4
-        with:
-          python-version: '3.8'
-          architecture: x64
-
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          override: true
-
-      - run: python -m pip install maturin
-        working-directory: ./bindings/python
-
-      - run: maturin sdist -o dist
-        working-directory: ./bindings/python
-
-      - name: Installing sdist
-        run: pip install dist/*
-        working-directory: ./bindings/python
-
   fmt:
     name: Rustfmt
     runs-on: ubuntu-20.04