tests/msc_vlr/Makefile.am: drop -ldbi

Fix for:
  /usr/bin/ld: cannot find -ldbi

Fixes: d43c22 ("switch from libdbi to lbsqlite3")
Change-Id: I8dcce119a8121881d56cb18328b5f702763b43ea
diff --git a/tests/msc_vlr/Makefile.am b/tests/msc_vlr/Makefile.am
index b1853a1..505b5c7 100644
--- a/tests/msc_vlr/Makefile.am
+++ b/tests/msc_vlr/Makefile.am
@@ -44,7 +44,6 @@
 	$(LIBOSMOGSUPCLIENT_LIBS) \
 	$(LIBSQLITE3_LIBS) \
 	$(LIBRARY_GSM) \
-	-ldbi \
 	$(NULL)
 
 noinst_HEADERS = \