Revert "[BUGFIX] Automatically use JsonView for json format"

This reverts commit 9c0e151e.

The original patch followed the misconception that when using json as format query parameter, Extbase would automatically use the JsonView object. Instead, Extbase should only try to find a template file with a .json file type.

Change-Id: Id224ad901d1e415687c8cd2207d516b19a09fd99
Releases: master
Resolves: #90875
Reverts: #90788
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63974


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Christian Eßl <indy.essl@gmail.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Christian Eßl <indy.essl@gmail.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>