qemuxml2argvtest: Don't overwrite driver stateDir

This is a very historic artefact. Back in the old days of
830ba76c when we had macros to add arguments onto qemu command
line (!) we thought it was a good idea to let qemu write out the
PID file. So we passed -pidfile $stateDir/$domName onto the
command line. Thus, in order for tests to work we needed stable
stateDir in the qemu driver. Unfortunately, after 16efa11a
where stateDir is mkdtemp()-d, this approach lead to a leak of
temp dir.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

tests/qemuxml2argvtest.c

@@ -581,9 +581,6 @@ mymain(void)
     if (VIR_STRDUP_QUIET(driver.config->chardevTLSx509certdir, "/etc/pki/libvirt-chardev") < 0)
         return EXIT_FAILURE;
 
-    VIR_FREE(driver.config->stateDir);
-    if (VIR_STRDUP_QUIET(driver.config->stateDir, "/nowhere") < 0)
-        return EXIT_FAILURE;
     VIR_FREE(driver.config->hugetlbfs);
     if (VIR_ALLOC_N(driver.config->hugetlbfs, 2) < 0)
         return EXIT_FAILURE;