Remove Metabox in functions.php

Hi minti,
i try to remove the metabox Background Styling Option and Revolution Slider Options permanently for all users in functions.php. But my code is not successful in doing so.

1	remove_meta_box( 'minti_styling', 'post', 'normal' );

i also tried

1	remove_meta_box( 'styling', 'post', 'normal' );

How can i address it? And where can i find the correct id in your code?

Thanks!
fraganzy

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