Call "new" instead of no-throw version and the MBED_ERROR.

Standard new operator already calls MBED_ERROR in failure.

Author: Seppo Takalo

features/netsocket/NetworkInterface.cpp

@@ -105,11 +105,7 @@ static void call_all_event_listeners(NetworkInterface *iface, nsapi_event_t even
 void NetworkInterface::add_event_listener(mbed::Callback<void(nsapi_event_t, intptr_t)> status_cb)
 {
     iface_eventlist_t *event_list = get_interface_event_list_head();
-    iface_eventlist_entry_t *entry = new (std::nothrow) iface_eventlist_entry_t;
-    if (!entry) {
-        MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_NETWORK_STACK, MBED_ERROR_CODE_ENOMEM), "Failed to allocate entry");
-        return;
-    }
+    iface_eventlist_entry_t *entry = new iface_eventlist_entry_t;
     entry->iface = this;
     entry->status_cb = status_cb;
     ns_list_add_to_end(event_list, entry);