src: Remove unnecessary std::move to allow copy elision

Change-Id: I1a83c762dfc51525affd5b01a3c4822b9579c57a
Refs: #3357
diff --git a/src/security/key.cpp b/src/security/key.cpp
index 48c8aa3..3d91cad 100644
--- a/src/security/key.cpp
+++ b/src/security/key.cpp
@@ -140,8 +140,7 @@
   validityCheck();
 
   if (m_needRefreshCerts) {
-    m_certificates = std::move(CertificateContainer(m_impl->getCertificatesOfKey(m_id, m_keyId),
-                                                    m_impl));
+    m_certificates = CertificateContainer(m_impl->getCertificatesOfKey(m_id, m_keyId), m_impl);
     m_needRefreshCerts = false;
   }