fix: remove unnecessary submodule checkout from CI workflows

Tests use HATE_CRACK_SKIP_INIT=1 and don't need submodules.
Shallow submodule clones caused flaky CI failures on PR events.

Fixes #72

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/pytest-py310.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: recursive
 
       - uses: actions/setup-python@v5
         with:

.github/workflows/pytest-py311.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: recursive
 
       - uses: actions/setup-python@v5
         with:

.github/workflows/pytest-py312.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: recursive
 
       - uses: actions/setup-python@v5
         with:

.github/workflows/pytest-py313.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: recursive
 
       - uses: actions/setup-python@v5
         with:

.github/workflows/pytest-py314.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: recursive
 
       - uses: actions/setup-python@v5
         with:

.github/workflows/pytest-py39.yml

@@ -9,8 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: recursive
 
       - uses: actions/setup-python@v5
         with:

.github/workflows/pytest.yml

@@ -12,8 +12,6 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - uses: actions/checkout@v4
-        with:
-          submodules: recursive
 
       - uses: actions/setup-python@v5
         with: