[BUGFIX] Wires should be removed together with relations

If a wired relation is removed the related wire should be removed also

Resolves: #5677
Releases: 6.2

Change-Id: Ic48c9e277534fcbf2765830e71d68e4b09577670
Reviewed-on: https://review.typo3.org/29752
Reviewed-by: Nico de Haen
Tested-by: Nico de Haen