You can get rid of ruler lines in Photoshop by following these steps:
1.Open the image in Photoshop.
2.If the rulers are not visible, go to the "View" menu and select "Rulers" or use the keyboard shortcut "Ctrl+R" (Windows) or "Command+R" (Mac) to show them.
3.To hide the rulers, simply uncheck the "Rulers" option in the "View" menu, or use the keyboard shortcut again.
4.If you want to remove the ruler lines from the image itself, select the "Crop" tool from the toolbar on the left side of the screen.
5.In the options bar at the top of the screen, uncheck the "Show Overlay" option.
6.Click and drag the crop tool over the entire image to remove the ruler lines.
7.Press "Enter" or "Return" to apply the crop.
Your image will now be free of any ruler lines. Note that this will also remove any other marks or guides that may be present on the image. If you want to preserve those, you'll need to use a different method, such as cloning or healing tools to remove the ruler lines from the image.