Revert "Header updated to export proxy function for creating objectnodes."

This reverts commit 47570df2539ef170d1ae8ea5f767994d43ad39a8.

include/ua_client.h

@@ -56,10 +56,7 @@ UA_AddReferencesResponse UA_EXPORT
 UA_DeleteNodesResponse UA_EXPORT UA_Client_deleteNodes(UA_Client *client, UA_DeleteNodesRequest *request);
 UA_DeleteReferencesResponse UA_EXPORT
     UA_Client_deleteReferences(UA_Client *client, UA_DeleteReferencesRequest *request);
-
-UA_AddNodesResponse UA_EXPORT *UA_Client_createObjectNode(UA_Client *client, UA_QualifiedName browseName, UA_LocalizedText displayName, 
-                                            UA_LocalizedText description, UA_ExpandedNodeId parentNodeId, UA_NodeId referenceTypeId,
-                                            UA_UInt32 userWriteMask, UA_UInt32 writeMask, UA_ExpandedNodeId typeDefinition );
+    
 #ifdef __cplusplus
 } // extern "C"
 #endif