refactor: remove explicit pytest package installation as uvx handles it

Author: ShawnDen-coder

repo_scaffold/templates/template-python/{{cookiecutter.project_slug}}/noxfile.py

@@ -44,9 +44,6 @@ def install_with_uv(session: nox.Session, extras: list[str] | None = None) -> No
     session.install("ruff")  # Explicitly install ruff
     if extras:
         session.run("uv", "sync", *(f"--extra={extra}" for extra in extras))
-        # Install pytest and related packages for test sessions
-        if any(extra == "dev" for extra in extras):
-            session.install("pytest", "pytest-cov", "pytest-mock")
     else:
         session.run("uv", "sync")