Post Meta is the information in WordPress that displays on a post and tells the reader archive information about the article or post. If you want to disable, you can do it using Theme Appearance. Do follow this tutorial. Refer attach screen shot.
1. How to disable Meta Box from Blog?
Go to => WP-Menu => Appearance => Customize =>Blog Page => Blog Page Setting
Here you can disable meta using checkbox. Kindly unchecked tick then Save & Publish. Refer attach screen shot.