qemu: Don't check the output of virGetUserCacheDirectory()

virGetUserCacheDirectory() *never* *ever* returns NULL, making the
checks for it completely unnecessary.
Signed-off-by: NFabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_conf.c

@@ -165,8 +165,6 @@ virQEMUDriverConfigPtr virQEMUDriverConfigNew(bool privileged)
         g_autofree char *cachedir = NULL;
 
         cachedir = virGetUserCacheDirectory();
-        if (!cachedir)
-            return NULL;
 
         cfg->logDir = g_strdup_printf("%s/qemu/log", cachedir);
         cfg->swtpmLogDir = g_strdup_printf("%s/qemu/log", cachedir);