tests: remove unwanted VIR_FREE of spice and vnc default listen

After the test and qemu_process refactor now we can benefit from default
listen address for spice and vnc in tests.
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

tests/qemuxml2argvdata/qemuxml2argv-graphics-spice-timeout.args

@@ -29,7 +29,7 @@ media=cdrom,id=drive-ide0-1-0 \
 -net tap,fd=3,vlan=0,name=hostnet0 \
 -serial pty \
 -device usb-tablet,id=input0 \
--spice port=5900 \
+-spice port=5900,addr=127.0.0.1 \
 -vga std \
 -device AC97,id=sound0,bus=pci.0,addr=0x3 \
 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5

tests/qemuxml2argvtest.c

@@ -489,9 +489,6 @@ mymain(void)
 
     driver.privileged = true;
 
-    VIR_FREE(driver.config->spiceListen);
-    VIR_FREE(driver.config->vncListen);
-
     VIR_FREE(driver.config->vncTLSx509certdir);
     if (VIR_STRDUP_QUIET(driver.config->vncTLSx509certdir, "/etc/pki/libvirt-vnc") < 0)
         return EXIT_FAILURE;