remove cookiecutter (#2421)

* remove cookiecutter

* Delete main.py

* Delete test_scaffold.py

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: quaquel

docs/best-practices.md

@@ -24,8 +24,6 @@ an `images` directory.
 The [Schelling](https://github.com/projectmesa/mesa-examples/tree/main/examples/schelling) model is
 a good example of a small well-packaged model.
 
-It's easy to create a cookiecutter mesa model by running `mesa startproject`
-
 ## Randomization
 
 If your model involves some random choice, you can use the built-in `random`

docs/index.md

@@ -56,7 +56,7 @@ and [solara](https://solara.dev/)
 
 - **mesa[network]** installs mesa and [networkx](https://networkx.org/)
 - **mesa[viz]** installs, mesa, [matplotlib](https://matplotlib.org/stable/install/index.html) and [solara](https://solara.dev/)
-- **mesa[dev]** installs mesa[rec], [ruff](https://docs.astral.sh/ruff/), [pytest](https://docs.pytest.org/en/stable/), [pytest-cov](https://pytest-cov.readthedocs.io/en/latest/), [sphinx](https://www.sphinx-doc.org/en/master/man/sphinx-build.html#cmdoption-sphinx-build-e), [pytest-mock](https://pytest-mock.readthedocs.io/en/latest/), [cookiecutter](https://cookiecutter.readthedocs.io/en/stable/)
+- **mesa[dev]** installs mesa[rec], [ruff](https://docs.astral.sh/ruff/), [pytest](https://docs.pytest.org/en/stable/), [pytest-cov](https://pytest-cov.readthedocs.io/en/latest/), [sphinx](https://www.sphinx-doc.org/en/master/man/sphinx-build.html#cmdoption-sphinx-build-e), [pytest-mock](https://pytest-mock.readthedocs.io/en/latest/)
 - **mesa[examples]** installs mesa[rec], [pytest](https://docs.pytest.org/en/stable/), and [scipy](https://scipy.org/)
 - **mesa[docs]** installs mesa[rec], [sphinx](https://www.sphinx-doc.org/en/master/man/sphinx-build.html#cmdoption-sphinx-build-e), [ipython](https://ipython.readthedocs.io/en/stable/install/kernel_install.html), [pydata_sphinx_theme](https://pydata-sphinx-theme.readthedocs.io/en/stable/),
 [seaborn](https://seaborn.pydata.org/), [myst-nb](https://myst-nb.readthedocs.io/en/latest/), [myst-parser](https://myst-parser.readthedocs.io/en/latest/)