[BUGFIX] Replace "without" with native JavaScript

"without" is a Prototype function which was removed earlier. The function
creates a clone of an array without the given element. The certain part
using this function is rewritten to native JavaScript.

Resolves: #69432
Releases: master
Change-Id: I23c83ded58d042d693be8bdbf92f5f5ae48aa5b6
Reviewed-on: http://review.typo3.org/42940


Reviewed-by: Alexander Opitz <opitz.alexander@googlemail.com>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>