[!!!][TASK] Removed optional fluid typoscript template

The typoscript template was meant as an example/showcase on how to
use Fluid Widgets in FE. The current used includes are outdated or
broken.

Resolves: #78988
Releases: master
Change-Id: I5c30b017c10d6244d6aa559d395e351dd242d48d
Reviewed-on: https://review.typo3.org/51105


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>