Step by step post processing Delete or remove unwanted areas or subject selection or selected objects from photos with content-aware tool. Remove Unwanted Areas from your Photos Naturally.
open image in new document. Take lasso tool and roughly draw on edges of the unwanted.
Fill selected area with content-aware. You can notice some dark patches (ghosting) which looks unnatural.
To fix it, again go back step backwards. this time use color adaptation checked.
it averages colors from whole image and apply to selected area. Now image looks perfectly natural. Here is before and after results.