services.cgi: Remove links from addon services

services.cgi: Remove links from addon services

- As discussed in Video Conf Call on Oct 7th 2024
- This patch removes the links from the addon services, in line with the change made
   to the core services.

Tested-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Bernhard Bitsch <bbitsch@ipfire.org>
Tested-by: Bernhard Bitsch <bbitsch@ipfire.org>
Acked-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>