Problem with flat images on my web page

[Fiffa0101]

I am not an expert, but know how to cut out a flat shot to then go on my website, but now if i look at the image on my webpage there is what looks like a very faint outline of a box, which i need to remove.  Would anyone be able to tell me how to sort this out in very plain English. Very many thanks,

[Glenn 8675309]

That looks like a "low drop shadow" with a lighting angle of 180 and width of zero.  The drop sadow color is "greyish".   

[Greg_S.]

. . . Or select the layer with the drop shadow style, right-click the tiny fx at the right of the layer and select Clear Layer Style.

[Glenn 8675309]

Man!  I never knew that!