Remove error for empty subtree response

This interface doesn't have to exist

Change-Id: If0ea4e3c201c80c25e825f64ba3601685ef9ed95
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/redfish-core/lib/storage.hpp b/redfish-core/lib/storage.hpp
index 856ef5e..f918d66 100644
--- a/redfish-core/lib/storage.hpp
+++ b/redfish-core/lib/storage.hpp
@@ -134,7 +134,7 @@
                      const crow::openbmc_mapper::GetSubTreeType &subtree) {
                 if (ec || !subtree.size())
                 {
-                    messages::internalError(asyncResp->res);
+                    // doesn't have to be there
                     return;
                 }