Fixed unit test's.

Change-Id: I59ce546c53909c2b5a2cf03bb86f94cc41320c30

Author: Juha Heiskanen

test/nanostack/unittest/mac/mac_pd_sap/test_mac_pd_sap.c

@@ -831,14 +831,6 @@ bool test_mac_cca_prepare_cb()
     rf_ptr.ack_tx_possible = false;
 
     rf_ptr.enhanced_ack_handler_timestamp = 10;
-    mlme_device_descriptor_t test_neigh;
-    mac_security_mib_stub.device_ptr = &test_neigh;
-
-    ret = mac_pd_sap_data_cb(&rf_ptr, &phy_message);
-    if (ret != 0) {
-        return false;
-    }
-    mac_security_mib_stub.device_ptr = NULL;
 
     ret = mac_pd_sap_data_cb(&rf_ptr, &phy_message);
     if (ret != -1 || rf_ptr.mac_ack_tx_active) {