Revert "[BUGFIX] EM: Fetch list as html, not as json"

This reverts commit 8a80c233

This change did not work at all, left unused 
templates behind (List/Ter.json),
and caused further bugs #53661

Change-Id: I62d1c6c06a5acb8aeed0a12226b3e7ed1bd3282b
Reviewed-on: https://review.typo3.org/25446
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel