[TASK] Remove file Tests/Functional/Fixtures/Frontend/request.tpl

This file is only used by typo3/testing-framework and has
been moved to that repository since version 1.1.1.

Releases: master, 8.7
Resolves: #81900
Change-Id: I5f88bd89c4cadd2fe65f4d0bc9f4494e172f4d2a
Reviewed-on: https://review.typo3.org/53643


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>