remove uv, doesn't support 3.7

.github/workflows/ci.yml

@@ -27,25 +27,18 @@ jobs:
     - name: Install dependencies
       run: |
         pip install --upgrade pip
-        
-        pip install uv
-        uv venv
-        source .venv/bin/activate
-        uv pip install -r dev-requirements.txt 
-        uv pip install .
+        pip install -r dev-requirements.txt 
+        pip install .
     - name: Check ruff
       run: |
-        source .venv/bin/activate
         ruff check . --exclude tests
         ruff format --check .
     - name: Test with pytest and report coverage
       run: |
-        source .venv/bin/activate
         cd tests
         coverage run --branch --source=../ -m pytest
         coverage report
         cd ..
     - name: Enforce module boundaries/dependencies
       run:
-        source .venv/bin/activate
         tach check