storage: Remove duplicitous refreshVol in RBD buildVol

As of commit id '155ca616' a 'refreshVol' is called after the buildVol
succeeds in storageVolCreateXML, thus the volStorageBackendRBDRefreshVolInfo
call in virStorageBackendRBDBuildVol is no longer necessary.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/storage/storage_backend_rbd.c

@@ -532,9 +532,6 @@ virStorageBackendRBDBuildVol(virConnectPtr conn,
         goto cleanup;
     }
 
-    if (volStorageBackendRBDRefreshVolInfo(vol, pool, &ptr) < 0)
-        goto cleanup;
-
     ret = 0;
 
  cleanup: