I guess the edge of the bottom shelf would help to balance out the image. Since that is not possible, maybe crop just a tad higher so the traces of the bottom shelf are not visible and then crop on the top to remove the traces of the upper shelf and supports. You can create your own frame with a black border.
I tend to overthink these issues. The attention should be on the goards and the shelving makes little difference.
Used the rectangular selection to copy the top shelf edge and pasted from the clipboard to a new layer. Then moved the shelf edge and slightly rotated it. Then used the erase tool on some of the top edge of the shelf to restore the lower edge of the pumpkins. Then merged the layers and used the clone stamp on the edges to re-build the ends and apply dark to the underside. Also retouched the edge with the clone stamp to remove characteristic marks that could be obviously matched to the top shelf.