virISCSIDirectReportLuns: Drop ClearVols

In bf5cf610f2 I've fixed a problem where iscsi-direct
backend was reporting only the last LUN. The fix consisted of
moving virStoragePoolObjClearVols() one level up. However, as it
turns out, storage driver already calls it before calling
refreshPool callback (which is
virStorageBackendISCSIDirectRefreshPool() in this case).

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>

src/storage/storage_backend_iscsi_direct.c

@@ -375,7 +375,6 @@ virISCSIDirectReportLuns(virStoragePoolObjPtr pool,
 
     def->capacity = 0;
     def->allocation = 0;
-    virStoragePoolObjClearVols(pool);
     for (i = 0; i < list->num; i++) {
         if (virISCSIDirectRefreshVol(pool, iscsi, list->luns[i], portal) < 0)
             goto cleanup;