Replace unwanted content with the Patch tool

Select the Patch tool (J)  from the toolbar. If you can't find the Patch tool, click and hold the Spot Healing Brush  tool to show the other related tools and then select the Patch tool.

In the tool options bar, choose Normal as the Patch option, and select either Source or Destination.

With the Patch tool selected, draw a selection border over an area on your image that you want to replace. 

To patch the Source, drag your selection to an area that contains matching detail to cover the part of the image you want to remove. To patch the Destination, drag the selection to that part of your image where you want to copy the selected pixels.