How to remove the Greyish outline of Image with text on home page? - Dawn theme

[BraxtonEcom]

I would like to remove the greyish outline around the below image from the image with text section on the homepage. I would like it so that it is just the same plain background all around #FAFAFA.

URL: https://www.soundshield.co.uk/

Theme: Dawn

Any advice is really appreciated

[BraxtonEcom]

URL: https://www.soundshield.co.uk/

Theme: Dawn

Any advice is really appreciated