[TASK] Remove superflous html templates

Removes templates from typo3/templates/ that are not in use.

Change-Id: I6af873e4accd3b1376a6b61b5980a7f583b86d38
Fixes: #47875
Releases: 6.2
Reviewed-on: https://review.typo3.org/20465
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Benjamin Mack
Tested-by: Benjamin Mack