remove UA_ACCESSLEVELMASK_WRITE from current time

examples/server.c

@@ -212,7 +212,7 @@ main(int argc, char **argv) {
     UA_VariableAttributes v_attr = UA_VariableAttributes_default;
     v_attr.description = UA_LOCALIZEDTEXT("en-US", "current time");
     v_attr.displayName = UA_LOCALIZEDTEXT("en-US", "current time");
-    v_attr.accessLevel = UA_ACCESSLEVELMASK_READ | UA_ACCESSLEVELMASK_WRITE;
+    v_attr.accessLevel = UA_ACCESSLEVELMASK_READ;
     v_attr.dataType = UA_TYPES[UA_TYPES_DATETIME].typeId;
     v_attr.valueRank = -1;
     const UA_QualifiedName dateName = UA_QUALIFIEDNAME(1, "current time");