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

virGetUserDirectory() *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_interop_config.c

@@ -118,9 +118,6 @@ qemuInteropFetchConfigs(const char *name,
         if (!xdgConfig) {
             g_autofree char *home = virGetUserDirectory();
 
-            if (!home)
-                return -1;
-
             xdgConfig = g_strdup_printf("%s/.config", home);
         }