fix osmo-bsc example configuration file
diff --git a/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg b/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg
index ce24f5c..d746196 100644
--- a/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg
+++ b/openbsc/doc/examples/osmo-bsc/osmo-bsc.cfg
@@ -97,5 +97,4 @@
  ip.access rtp-base 4000
  timeout-ping 20
  timeout-pong 5
- mid-call-timeout 0
  dest 192.168.100.11 6666 0