Remove “enter an YouTube API key” message from dashboard

Hi,
I activated your plugin and it seems to be working very well, thank you.

Just I get this message fixed in the dashboard without an X to remove it.

For WP YouTube Lyte to function optimally, you should enter an YouTube API key in the settings screen.

The point is that I don’t see any reason to bother with an API key when the plugin is working perfectly right now, besides it’s not even clear how that would be even more beneficial than now.

Could you please tell me how to remove that message from the dashboard?
Maybe I should delete something in the plugin’s PHP code?

Thank you!