Remove submodules: recursive (testing complete)

Revert the temporary addition of `submodules: recursive` to
`actions/checkout` in `cygwin-test.yml`, `pythonpackage.yml`, and
`alpine-test.yml`. The bugfix in the immediately preceding commit is now
established to work regardless of which mechanism populates the
submodules.

Returning the workflows to their pre-test posture restores the standing
arrangement: `init-tests-after-clone.sh` as the sole submodule source on
upstream CI. See PR gitpython-developers#1715
(gitpython-developers#1715) for the
rationale.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: EliahKagan

.github/workflows/alpine-test.yml

@@ -29,9 +29,6 @@ jobs:
     - uses: actions/checkout@v6
       with:
         fetch-depth: 0
-        # Temporary, for testing. The standing decision is to NOT pre-clone
-        # submodules on CI; see https://github.com/gitpython-developers/GitPython/pull/1715
-        submodules: recursive
 
     - name: Set workspace ownership
       run: |

.github/workflows/cygwin-test.yml

@@ -39,9 +39,6 @@ jobs:
       uses: actions/checkout@v6
       with:
         fetch-depth: 0
-        # Temporary, for testing. The standing decision is to NOT pre-clone
-        # submodules on CI; see https://github.com/gitpython-developers/GitPython/pull/1715
-        submodules: recursive
 
     - &install-cygwin
       name: Install Cygwin

.github/workflows/pythonpackage.yml

@@ -53,9 +53,6 @@ jobs:
     - uses: actions/checkout@v6
       with:
         fetch-depth: 0
-        # Temporary, for testing. The standing decision is to NOT pre-clone
-        # submodules on CI; see https://github.com/gitpython-developers/GitPython/pull/1715
-        submodules: recursive
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6