fix: No warning for None values and remove a doc dependency

[hpohekar]

1. Remove tensorflow dependency as it is supported for Python version <= 3.10.
2. quarto-cli works fine after updating ansys-sphinx-theme.
3. Do not show a warning if graphics_drivers or ui_mode are None.

We will merge this PR before creating a release.

Earlier -

solver = launch_fluent(start_container=True, dry_run=True)
/home/hpohekar/pyfluent/src/ansys/fluent/core/launcher/launch_options.py:309: PyFluentUserWarning: User-specified value for graphics driver is ignored while launching Fluent without GUI or without graphics.
  warnings.warn(
pyfluent.launcher WARNING: Configuring Fluent container to mount to /home/hpohekar/pyfluent, with this path available as /home/container/workdir for the Fluent session running inside the container.

Now -

solver = launch_fluent(start_container=True, dry_run=True)
pyfluent.launcher WARNING: Configuring Fluent container to mount to /home/hpohekar/pyfluent, with this path available as /home/container/workdir for the Fluent session running inside the container.

[raph-luc]

Does this also work? Then don't need to add the flake disable directive

Suggested change

	driver = _get_graphics_driver(graphics_driver=None, ui_mode=None) # noqa: F841
	_get_graphics_driver(graphics_driver=None, ui_mode=None)