ttcn3-sip: Drop uneeded module param MNCC_Emulation.mp_mncc_version

Since -latest was updated to newer releases, this param is never set to
changed anymore, so there's no need to set it here explicitly.

Change-Id: Ia9d6b7f383d6532f8f2da381e80f98af82a98e74
Related: OS#5042

ttcn3-sip-test/SIP_Tests.cfg

@@ -13,7 +13,6 @@
 SIP_Tests.mp_local_host := "172.18.11.103"
 SIP_Tests.mp_osmosip_host := "172.18.11.10"
 SIP_Tests.mp_mncc := "/data/unix/mncc"
-MNCC_Emulation.mp_mncc_version := 7
 
 [MAIN_CONTROLLER]