[TASK] Remove leftover jsfunc JS inclusions

There are some inclusions of the removed
jsfunc.formupdate.js file which was unused
for the last years.

Resolves: #63002
Releases: master
Change-Id: If748b584f4ef84d8010def47a4868445d44470f5
Reviewed-on: http://review.typo3.org/34234
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>