trying to delete shaded box with “ABOUT (my name)

I am a beginner and am not sure what the solution is for this. On each of my posts there is a shaded box with ‘ABOUT MARIANNE’ just below the post and signature, but before the tags.

https://i58.photobucket.com/albums/g257/mari_anne3/Capture_zpsv8k6eokw.png

https://www.50plsuvegan.com and I used the theme Comley

If someone could lead me in the correct direction, it would be much appreciated.