Update groovy_boot_script.txt used by packaging Jenkins

Remove code that was only supposed to be used by CI jenkins.

This code does not exist in the CI jenkins groovy script, and
the CI jenkins does not use this file either.

Change-Id: I584c831ed480300947fa493e92a460118d27f346
Reviewed-by: Simo Fält <simo.falt@digia.com>