s1gw: S1GW_Tests.default: fix empty junit-xml-*.log files

I copied this line from some other testsuite (likely ttcn3-mme-test).
For some reason it makes TITAN produce empty junit-xml-*.log files,
which are essential for the Test Results Analyzer in Jenkins.

Change-Id: Ia80bf9640a465dd748f0a47c543b9a745a236133
Related: SYS#6772
---
M s1gw/S1GW_Tests.default
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/s1gw/S1GW_Tests.default b/s1gw/S1GW_Tests.default
index ceca1b2..4ed872b 100644
--- a/s1gw/S1GW_Tests.default
+++ b/s1gw/S1GW_Tests.default
@@ -1,7 +1,6 @@
 [LOGGING]
 FileMask := LOG_ALL | TTCN_MATCHING;
 ConsoleMask := ERROR | WARNING | PARALLEL | VERDICTOP | USER;
-mtc.FileMask := ERROR | WARNING | PARALLEL | VERDICTOP;
 
 [TESTPORT_PARAMETERS]
 

