BSC_Tests: drop redundant f_init() in f_test_si2quater()

There is a global boolean flag that would make f_init() return
early if it's called twice.  This is exactly the case here.

Change-Id: Ic33786c4851d2682deec7c22fafb99043c1c1cf6
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index f72ab22..4444579 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -2271,8 +2271,6 @@
 
 	f_init_bts_and_check_sysinfo(0, expect_si := expect_si);
 
-	f_init(1);
-
 	if (not istemplatekind(expect_cells, "omit")) {
 		/* Also check that RR Channel Release contains these EARFCNs.
 		 * (copied code from TC_chan_rel_hard_clear_csfb) */