To get rid of the grid in Photoshop, follow these steps:
1. Open the Photoshop document that has the grid.
2. Click on the "View" menu in the top menu bar.
3. In the View menu, uncheck the "Show" option next to "Grid".
4. The grid lines should now disappear from your document.
Alternatively, you can use the keyboard shortcut "Ctrl + ' (apostrophe)" on Windows or "Cmd + ' (apostrophe)" on Mac to toggle the grid on and off.
If you want to customize the grid or change its properties, you can do so by going to the "Edit" menu and choosing "Preferences" and then "Guides, Grid & Slices" (Windows) or "Photoshop" and then "Preferences" and "Guides, Grid & Slices" (Mac). From there, you can adjust the spacing, color, and other properties of the grid.