ci: remove GitHub Actions test workflow

.github/workflows/python-tests.yml

@@ -1,40 +0,0 @@
-name: Python Tests
-
-on:
-  push:
-    branches: [main]
-  pull_request:
-    branches: [main]
-
-jobs:
-  tests:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Set up Python 3.11
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.11'
-
-      - name: Install dependencies
-        run: |
-          pip install --upgrade pip
-          pip install pytest pytest-asyncio httpx fastapi uvicorn pydantic pydantic-settings \
-            sqlalchemy aiosqlite sqlmodel python-dotenv slowapi orjson prometheus-client \
-            PyNaCl pycryptodome argon2-cffi websockets
-
-      - name: Install aitbc-crypto package
-        run: pip install -e packages/py/aitbc-crypto
-
-      - name: Run coordinator-api tests
-        run: |
-          PYTHONPATH=apps/coordinator-api/src:packages/py/aitbc-crypto/src:packages/py/aitbc-sdk/src \
-            python -m pytest apps/coordinator-api/tests -q
-
-      - name: Run blockchain-node tests
-        run: |
-          PYTHONPATH=apps/blockchain-node/src:packages/py/aitbc-crypto/src \
-            python -m pytest apps/blockchain-node/tests/test_websocket.py -q