templates: bsc/nitb: Remove explicit no force-combined-si

It's always been the default anyway, so no need to explicitly state it.
Furthermore, recently (osmobsc 167cb828665b91ed7d28007abd4a1862ebbb78c9)
force-combined-si was enabled by default for nanoBTS due to issues with
some MS not registering when it's not enabled, so let's osmo-bsc decide
were should it be enabled.

Related: OS#3063
Change-Id: I97b10406a4a0048c66a47aa7d32a113f0c0366d1
3 files changed