face: delete deprecated FaceSystem constructor

Change-Id: I54d623f1432428c2c3516a00f66dfe3f847bbc2c
Refs: #3377, #4021
diff --git a/tests/daemon/mgmt/face-manager-create-face.t.cpp b/tests/daemon/mgmt/face-manager-create-face.t.cpp
index 4431256..4274efa 100644
--- a/tests/daemon/mgmt/face-manager-create-face.t.cpp
+++ b/tests/daemon/mgmt/face-manager-create-face.t.cpp
@@ -313,7 +313,7 @@
       FaceUri uri;
       if (uri.parse(FaceType::getParameters().getUri())) {
         // ensure face not created
-        auto& faceTable = this->node1.manager.m_faceTable;
+        const auto& faceTable = this->node1.faceTable;
         BOOST_CHECK(std::none_of(faceTable.begin(), faceTable.end(), [uri] (Face& face) {
           return face.getRemoteUri() == uri;
         }));